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Debt and Letters of Credit - 2028 Notes (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 31, 2018 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Line of Credit Facility [Line Items] |  |  |  |
Proceeds from issuance of 2029 Notes, net of issuance costs |  | $ 0 | $ 0 | $ 560,000,000
Repayments of debt |  | $ 37,000,000 | 57,000,000 | $ 249,000,000
2029 Notes (1.125% Convertible Senior Notes) |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt instrument, face amount | $ 600,000,000 |  |  |
Interest rate | 4.25% |  |  |
Proceeds from issuance of 2029 Notes, net of issuance costs | $ 595,000,000 |  |  |
2029 Notes (1.125% Convertible Senior Notes) | Prior to June 15, 2028 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Redemption price (as a percent) |  | 100.00% |  |
Senior Notes Due 2018, 2016 and 2014 |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Redemption price (as a percent) |  | 101.00% |  |
2028 Notes (4.250% Senior Notes) |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Interest rate |  | 4.25% |  |
Repayments of debt |  | $ 37,000,000 | $ 57,000,000 |

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