v3.19.1
Financial Instruments - maturity analysis - Contractual Maturity (Details) - GBP (£)
£ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Financial instruments    
Contractual maturity period for undiscounted cash flows 20 years  
Threshold period for principal amounts of financial liabilities to be excluded from contractual maturity for cash outflows 20 years  
Threshold period for interest payments of financial liabilities to be excluded from contractual maturity for cash outflows 20 years  
Financial Assets £ 694,235 £ 738,056
Financial Liabilities 647,745 688,963
0-3 months | Financial assets    
Financial instruments    
Undiscounted cash flows, assets 151,516 161,500
0-3 months | Total maturing assets    
Financial instruments    
Undiscounted cash flows, assets 108,196 115,321
0-3 months | Cash and balances at central banks    
Financial instruments    
Undiscounted cash flows, assets 88,897 98,337
0-3 months | Settlement balances    
Financial instruments    
Undiscounted cash flows, assets 2,928 2,517
0-3 months | Loans to banks    
Financial instruments    
Undiscounted cash flows, assets 11,920 10,792
0-3 months | Other financial assets    
Financial instruments    
Undiscounted cash flows, assets 4,451 3,675
0-3 months | Loans to customers    
Financial instruments    
Undiscounted cash flows, assets 43,096 45,898
0-3 months | Derivative held for hedging    
Financial instruments    
Undiscounted cash flows, assets 224 281
0-3 months | Financial liabilities    
Financial instruments    
Undiscounted cash flows, liabilities 365,737 375,209
0-3 months | Total maturing liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 14,502 18,657
0-3 months | Bank deposits    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 7,417 9,180
0-3 months | Settlement Balances and other liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 3,066 2,844
0-3 months | Other financial liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 1,736 4,360
0-3 months | Subordinated Liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 131 87
0-3 months | Other liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 2,152 2,186
0-3 months | Customer accounts    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 351,054 356,340
0-3 months | Derivatives held for hedging    
Financial instruments    
Undiscounted cash flows, derivative financial liabilities 181 212
0-3 months | Guarantees and Commitments    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 120,795 128,947
0-3 months | Guarantees    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 3,952 7,718
0-3 months | Commitments    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 116,843 121,229
3-12 months | Financial assets    
Financial instruments    
Undiscounted cash flows, assets 40,938 39,385
3-12 months | Total maturing assets    
Financial instruments    
Undiscounted cash flows, assets 8,322 6,522
3-12 months | Loans to banks    
Financial instruments    
Undiscounted cash flows, assets 925 633
3-12 months | Other financial assets    
Financial instruments    
Undiscounted cash flows, assets 7,397 5,889
3-12 months | Loans to customers    
Financial instruments    
Undiscounted cash flows, assets 32,087 32,031
3-12 months | Derivative held for hedging    
Financial instruments    
Undiscounted cash flows, assets 529 832
3-12 months | Financial liabilities    
Financial instruments    
Undiscounted cash flows, liabilities 16,304 13,294
3-12 months | Total maturing liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 7,884 9,162
3-12 months | Bank deposits    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 21 1,740
3-12 months | Other financial liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 7,226 4,777
3-12 months | Subordinated Liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 637 2,645
3-12 months | Customer accounts    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 8,114 3,843
3-12 months | Derivatives held for hedging    
Financial instruments    
Undiscounted cash flows, derivative financial liabilities 306 289
1-3 years | Financial assets    
Financial instruments    
Undiscounted cash flows, assets 81,680 78,467
1-3 years | Total maturing assets    
Financial instruments    
Undiscounted cash flows, assets 14,244 12,054
1-3 years | Loans to banks    
Financial instruments    
Undiscounted cash flows, assets 106 94
1-3 years | Other financial assets    
Financial instruments    
Undiscounted cash flows, assets 14,138 11,960
1-3 years | Loans to customers    
Financial instruments    
Undiscounted cash flows, assets 66,441 65,077
1-3 years | Derivative held for hedging    
Financial instruments    
Undiscounted cash flows, assets 995 1,336
1-3 years | Financial liabilities    
Financial instruments    
Undiscounted cash flows, liabilities 28,774 18,009
1-3 years | Total maturing liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 25,985 15,769
1-3 years | Bank deposits    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 13,785 3,614
1-3 years | Other financial liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 10,724 10,640
1-3 years | Subordinated Liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 1,476 1,515
1-3 years | Customer accounts    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 1,727 1,052
1-3 years | Derivatives held for hedging    
Financial instruments    
Undiscounted cash flows, derivative financial liabilities 1,062 1,188
3-5 years | Financial assets    
Financial instruments    
Undiscounted cash flows, assets 63,463 63,662
3-5 years | Total maturing assets    
Financial instruments    
Undiscounted cash flows, assets 11,279 11,312
3-5 years | Other financial assets    
Financial instruments    
Undiscounted cash flows, assets 11,279 11,312
3-5 years | Loans to customers    
Financial instruments    
Undiscounted cash flows, assets 51,839 52,016
3-5 years | Derivative held for hedging    
Financial instruments    
Undiscounted cash flows, assets 345 334
3-5 years | Financial liabilities    
Financial instruments    
Undiscounted cash flows, liabilities 21,623 21,977
3-5 years | Total maturing liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 21,193 21,374
3-5 years | Bank deposits    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 2,003 16,023
3-5 years | Other financial liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 11,658 3,731
3-5 years | Subordinated Liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 7,532 1,620
3-5 years | Customer accounts    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 14 77
3-5 years | Derivatives held for hedging    
Financial instruments    
Undiscounted cash flows, derivative financial liabilities 416 526
5-10 years | Financial assets    
Financial instruments    
Undiscounted cash flows, assets 78,956 81,479
5-10 years | Total maturing assets    
Financial instruments    
Undiscounted cash flows, assets 11,826 12,813
5-10 years | Other financial assets    
Financial instruments    
Undiscounted cash flows, assets 11,826 12,813
5-10 years | Loans to customers    
Financial instruments    
Undiscounted cash flows, assets 66,978 68,500
5-10 years | Derivative held for hedging    
Financial instruments    
Undiscounted cash flows, assets 152 166
5-10 years | Financial liabilities    
Financial instruments    
Undiscounted cash flows, liabilities 11,696 18,402
5-10 years | Total maturing liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 11,053 17,569
5-10 years | Bank deposits    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities   61
5-10 years | Other financial liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 9,316 9,762
5-10 years | Subordinated Liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 1,737 7,746
5-10 years | Customer accounts    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 6 20
5-10 years | Derivatives held for hedging    
Financial instruments    
Undiscounted cash flows, derivative financial liabilities 637 813
10-20 years | Financial assets    
Financial instruments    
Undiscounted cash flows, assets 82,417 85,744
10-20 years | Total maturing assets    
Financial instruments    
Undiscounted cash flows, assets 2,744 3,638
10-20 years | Other financial assets    
Financial instruments    
Undiscounted cash flows, assets 2,744 3,638
10-20 years | Loans to customers    
Financial instruments    
Undiscounted cash flows, assets 79,543 81,995
10-20 years | Derivative held for hedging    
Financial instruments    
Undiscounted cash flows, assets 130 111
10-20 years | Financial liabilities    
Financial instruments    
Undiscounted cash flows, liabilities 4,067 3,468
10-20 years | Total maturing liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 3,510 2,702
10-20 years | Bank deposits    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 59 71
10-20 years | Other financial liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 2,029 49
10-20 years | Subordinated Liabilities    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 1,422 2,582
10-20 years | Customer accounts    
Financial instruments    
Undiscounted cash flows, non-derivative financial liabilities 26 28
10-20 years | Derivatives held for hedging    
Financial instruments    
Undiscounted cash flows, derivative financial liabilities 531 738
Held-for-trading | Financial Assets and Liabilities, Category    
Financial instruments    
Financial Liabilities 198,300 £ 232,900
FVTPL | Financial Assets and Liabilities, Category    
Financial instruments    
Financial Assets £ 207,900