XML 93 R81.htm IDEA: XBRL DOCUMENT v3.7.0.1
Cash Payments For Interest (Net of Amounts Capitalized) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Debt Disclosure [Abstract]      
Cash payments for interest (net of amounts capitalized) $ 1,152 $ 1,023 $ 681