CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Statement of Comprehensive Income [Abstract] | ||
| Net income | $ 107 | $ 77 |
| Other comprehensive (loss) income: | ||
| Unrealized investment (loss) gain | (7) | 1 |
| Less: effect of income taxes | 0 | 0 |
| Other comprehensive (loss) income, net of tax | (7) | 1 |
| Comprehensive income | $ 100 | $ 78 |