Quarterly report pursuant to Section 13 or 15(d)

Debt - Interest Expense (Details)

v3.7.0.1
Debt - Interest Expense (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Debt Instrument [Line Items]    
Total interest cost $ 354 $ 293
Capitalized interest (189) (217)
Total interest expense, net 165 76
Convertible Debt [Member]    
Debt Instrument [Line Items]    
Interest per contractual rate 53 49
Amortization of debt discount 7 9
Amortization of debt issuance costs 2 1
Total interest cost 62 59
Debt Excluding Convertible Debt [Member]    
Debt Instrument [Line Items]    
Total interest cost $ 292 $ 234