v3.6.0.2
Segment and Related Information, Reconciliation of EBITDA to income (loss) from continuing operations before income taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
EBITDA: [Abstract]      
Total segment EBITDA $ 6,611 $ 7,546 $ 7,033
Other EBITDA (9) (13) 17
Less: [Abstract]      
Depreciation and amortization expense (1,064) (1,047) (1,019)
Interest expense (322) (310) (352)
Add: [Abstract]      
Interest income 17 33 33
Income from continuing operations before income taxes $ 5,233 $ 6,209 $ 5,712