Commitments and Contingencies - Additional Information (Details) - USD ($) |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2019 |
Jun. 30, 2020 |
Jun. 30, 2019 |
Dec. 31, 2019 |
Jun. 30, 2017 |
|
| Debt Instrument [Line Items] | ||||||
| Operating lease costs | $ 21,000,000 | $ 16,000,000 | $ 40,000,000 | $ 31,000,000 | ||
| Operating lease liabilities, payments | 26,000,000 | |||||
| Right-of-use assets obtained in exchange for operating lease liabilities | $ 94,000,000 | |||||
| Weighted-average lease remaining lease term | 8 years 10 months 24 days | 8 years 10 months 24 days | ||||
| Weighted-average discount rate | 3.50% | 3.50% | ||||
| Undiscounted cash flows | $ 359,000,000 | |||||
| Unrecognized tax benefits | $ 12,000,000 | 12,000,000 | ||||
| Letters of credit | 20,000,000 | 20,000,000 | ||||
| Amortization of debt issuance cost | ||||||
| Debt Instrument [Line Items] | ||||||
| Principal | $ 764,778,000 | $ 764,778,000 | $ 782,491,000 | $ 782,500,000 | ||
| Minimum | ||||||
| Debt Instrument [Line Items] | ||||||
| Operating lease term | 4 years | 4 years | ||||
| Maximum | ||||||
| Debt Instrument [Line Items] | ||||||
| Operating lease term | 15 years | 15 years | ||||