Income Taxes - Additional Information (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
Income Tax Disclosure [Abstract] | ||||
Effective income tax rate | 26.20% | 23.60% | 18.70% | 22.60% |
Cash paid for income taxes, net of refunds | $ 241 | $ 489 |