Fair Value Measurements - Summary of Book Value and Principal Amounts of Long-Term Debt (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Dec. 31, 2024 |
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| Debt Instrument [Line Items] | ||
| Book value | $ 790 | $ 790 |
| Principal amount of debt | $ 793 | $ 793 |
| Senior Debentures 6.900% Due 2028 | ||
| Debt Instrument [Line Items] | ||
| Interest rate | 6.90% | 6.90% |
| Debt issuance year | 1998 | |
| Book value | $ 27 | $ 27 |
| Principal amount of debt | $ 28 | $ 28 |
| Senior Debentures 6.920% Due 2028 | ||
| Debt Instrument [Line Items] | ||
| Interest rate | 6.92% | 6.92% |
| Debt issuance year | 2005 | |
| Book value | $ 391 | $ 391 |
| Principal amount of debt | $ 391 | $ 391 |
| Senior Notes 6.125% Due 2034 | ||
| Debt Instrument [Line Items] | ||
| Interest rate | 6.125% | 6.125% |
| Debt issuance year | 2004 | |
| Book value | $ 372 | $ 372 |
| Principal amount of debt | $ 374 | $ 374 |
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- Definition Debt instrument issuance year. No definition available.
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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