Retirement Plan (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Retirement Benefits [Abstract] | |||
| Defined contribution plan covered employee, age (at least) | 21 years | ||
| Defined contribution plan matching contribution expense | $ 64 | $ 53 | $ 42 |
| X | ||||||||||
- Definition Defined Contribution Plan, Minimum Age For Coverage No definition available.
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- References No definition available.
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- Definition Amount of cost for defined contribution plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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