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Debt - Schedule of Carrying Value of Debt (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Instrument [Line Items] |  |
Total debt | $ 1,703 | $ 1,697
Convertible senior notes |  |
Debt Instrument [Line Items] |  |
Total convertible senior notes | 1,661 | 1,660
Convertible senior notes | 1.375% convertible senior notes due 2026 |  |
Debt Instrument [Line Items] |  |
Total convertible senior notes | $ 495 | 495
Stated Interest Rate | 1.375% |
Convertible senior notes | 2.75% convertible senior notes due 2025 |  |
Debt Instrument [Line Items] |  |
Total convertible senior notes | $ 560 | 560
Stated Interest Rate | 2.75% |
Convertible senior notes | 0.75% convertible senior notes due 2024 |  |
Debt Instrument [Line Items] |  |
Total convertible senior notes | $ 606 | 605
Stated Interest Rate | 0.75% |
Credit facilities |  |
Debt Instrument [Line Items] |  |
Warehouse line of credit | $ 42 | 37
Credit Suisse AG, Cayman Islands | Credit facilities |  |
Debt Instrument [Line Items] |  |
Repurchase agreements | 25 | 23
Citibank, N.A. | Credit facilities |  |
Debt Instrument [Line Items] |  |
Repurchase agreements | 0 | 3
Comerica Bank | Line of Credit | Credit facilities |  |
Debt Instrument [Line Items] |  |
Warehouse line of credit | $ 17 | $ 11

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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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