Earnings Per Share - Reconciliation of the Numerators and Denominators of the Earnings Per Share Calculations (Details) - USD ($) shares in Millions, $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Earnings Per Share [Abstract] | ||
| Net income attributable to the parent company | $ 108 | $ 75 |
| Less: Redeemable noncontrolling interests adjustment to redemption value | 0 | 0 |
| Net income available to common stockholders - Numerator diluted | 108 | 75 |
| Net income available to common stockholders - Numerator basic | $ 108 | $ 75 |
| Weighted-average shares outstanding - Basic | 145.6 | 144.6 |
| Employee compensation-related shares, including stock options | 1.9 | 1.3 |
| Weighted-average shares outstanding - Diluted | 147.5 | 145.9 |