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Debt - Schedule of Convertible Senior Notes (Details) - USD ($) | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | May 19, 2020 | May 15, 2020 | Oct. 09, 2019 | Sep. 09, 2019 | Jul. 03, 2018 | Dec. 12, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest Expense | $ 35,000,000 | $ 128,000,000 | $ 138,000,000 |  |  |  |  |  |
Convertible Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate Principal Amount | 1,672,000,000 |  |  |  |  |  |  |  |
Unamortized Debt Issuance Costs | 12,000,000 | 353,000,000 |  |  |  |  |  |  |
Fair Value | 1,664,000,000 | 2,451,000,000 |  |  |  |  |  |  |
Contractual Coupon Interest | 27,000,000 | 30,000,000 | 34,000,000 |  |  |  |  |  |
Amortization of Debt Discount |  | 89,000,000 | 97,000,000 |  |  |  |  |  |
Amortization of Debt Issuance Costs | 5,000,000 | 4,000,000 | 5,000,000 |  |  |  |  |  |
Interest Expense | 32,000,000 | 123,000,000 | 136,000,000 |  |  |  |  |  |
Convertible Debt | 1.375% convertible senior notes due 2026 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate Principal Amount | $ 499,000,000 |  |  |  |  |  | $ 500,000,000 |  |
Stated Interest Rate | 1.375% |  |  |  |  |  |  |  |
Effective Interest Rate | 1.57% |  |  |  |  |  |  |  |
Unamortized Debt Issuance Costs | $ 4,000,000 | 130,000,000 |  |  |  |  |  |  |
Fair Value | 504,000,000 | 781,000,000 |  |  |  |  |  |  |
Contractual Coupon Interest | 7,000,000 | 7,000,000 | 7,000,000 |  |  |  |  |  |
Amortization of Debt Discount |  | 22,000,000 | 20,000,000 |  |  |  |  |  |
Amortization of Debt Issuance Costs | 0 | 1,000,000 | 0 |  |  |  |  |  |
Interest Expense | 7,000,000 | 30,000,000 | 27,000,000 |  |  |  |  |  |
Convertible Debt | 2.75% convertible senior notes due 2025 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate Principal Amount | $ 565,000,000 |  |  | $ 65,000,000 | $ 500,000,000 |  |  |  |
Stated Interest Rate | 2.75% |  |  | 2.75% | 2.75% |  |  |  |
Effective Interest Rate | 3.20% |  |  |  |  |  |  |  |
Unamortized Debt Issuance Costs | $ 5,000,000 | 122,000,000 |  |  |  |  |  |  |
Fair Value | 531,000,000 | 725,000,000 |  |  |  |  |  |  |
Contractual Coupon Interest | 16,000,000 | 16,000,000 | 10,000,000 |  |  |  |  |  |
Amortization of Debt Discount |  | 27,000,000 | 15,000,000 |  |  |  |  |  |
Amortization of Debt Issuance Costs | 3,000,000 | 1,000,000 | 1,000,000 |  |  |  |  |  |
Interest Expense | 19,000,000 | 44,000,000 | 26,000,000 |  |  |  |  |  |
Convertible Debt | 0.75% convertible senior notes due 2024 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate Principal Amount | $ 608,000,000 |  |  |  |  | $ 73,000,000 | $ 600,000,000 |  |
Stated Interest Rate | 0.75% |  |  |  |  | 0.75% |  |  |
Effective Interest Rate | 1.02% |  |  |  |  |  |  |  |
Unamortized Debt Issuance Costs | $ 3,000,000 | 101,000,000 |  |  |  |  |  |  |
Fair Value | 629,000,000 | 945,000,000 |  |  |  |  |  |  |
Contractual Coupon Interest | 4,000,000 | 4,000,000 | 5,000,000 |  |  |  |  |  |
Amortization of Debt Discount |  | 32,000,000 | 33,000,000 |  |  |  |  |  |
Amortization of Debt Issuance Costs | 2,000,000 | 1,000,000 | 1,000,000 |  |  |  |  |  |
Interest Expense | 6,000,000 | 37,000,000 | 39,000,000 |  |  |  |  |  |
Convertible Debt | 1.50% convertible senior notes due 2023 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate Principal Amount |  |  |  |  |  |  |  | $ 374,000,000 |
Contractual Coupon Interest | 0 | 3,000,000 | 6,000,000 |  |  |  |  |  |
Amortization of Debt Discount |  | 8,000,000 | 15,000,000 |  |  |  |  |  |
Amortization of Debt Issuance Costs | 0 | 1,000,000 | 1,000,000 |  |  |  |  |  |
Interest Expense | 0 | 12,000,000 | 22,000,000 |  |  |  |  |  |
Convertible Debt | Convertible Senior Notes due 2021, 2.0% |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate Principal Amount |  |  |  |  |  |  |  |  | $ 460,000,000
Stated Interest Rate |  |  |  |  |  |  |  |  | 2.00%
Contractual Coupon Interest | 0 | 0 | 6,000,000 |  |  |  |  |  |
Amortization of Debt Discount |  | 0 | 14,000,000 |  |  |  |  |  |
Amortization of Debt Issuance Costs | 0 | 0 | 2,000,000 |  |  |  |  |  |
Interest Expense | $ 0 | $ 0 | $ 22,000,000 |  |  |  |  |  |

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