Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Noncontrolling Interest - Reconciliation of Changes in Redeemable Noncontrolling Interest (Details)

v3.8.0.1
Acquisitions and Noncontrolling Interest - Reconciliation of Changes in Redeemable Noncontrolling Interest (Details)
$ in Millions
9 Months Ended
Sep. 30, 2017
USD ($)
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]  
Balance, December 31, 2016 $ 145
Noncontrolling interest purchased related to USMM (115)
Contribution from redeemable noncontrolling interest 2
Net losses attributable to noncontrolling interests (12)
Balance, September 30, 2017 $ 20