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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Debt Disclosure [Abstract]        
Total interest cost $ 224 $ 205 $ 435 $ 397
Capitalized interest (70) (133) (151) (282)
Total interest expense, net $ 154 $ 72 $ 284 $ 115