Fair Value Measurements, Derivative Instruments and Hedging Activities and Financial Risks - Foreign Currency Exchange Rate Risks (Details) |
Aug. 31, 2018
USD ($)
|
|---|---|
| Fair Value, Measurement Inputs, Disclosure [Line Items] | |
| Foreign currency contract commitments | $ 10,500,000,000 |
| Foreign currency zero cost collars – cash flow hedges | Nieuw Statendam | Cash flow hedging | |
| Fair Value, Measurement Inputs, Disclosure [Line Items] | |
| Weighted-Average Floor Rate | 1.05 |
| Weighted- Average Ceiling Rate | 1.25 |
| Euro-denominated | |
| Fair Value, Measurement Inputs, Disclosure [Line Items] | |
| Debt instrument, face amount | $ 5,500,000,000.0 |
| Sterling-denominated | |
| Fair Value, Measurement Inputs, Disclosure [Line Items] | |
| Debt instrument, face amount | $ 861,000,000 |