Principles of Consolidation and Other Matters (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2024 |
Sep. 30, 2023 |
Sep. 30, 2024 |
Sep. 30, 2023 |
Dec. 31, 2023 |
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| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||||
| Operating funds related to regulatory requirements or as collateral under captive insurance arrangements | $ 507 | $ 507 | $ 486 | ||
| Equity method investments lag period (in months) | 3 months | ||||
| Net investment income | $ 1 | $ 1 | $ 3 | $ 6 | |
| Effective tax rate (as a percent) | 27.30% | 20.60% | 25.80% | 23.70% | |
| Share-based payments of excess tax benefit (as a percent) | 0.30% | 1.00% | 1.30% | 1.20% | |
| Valuation allowance | $ 48 | ||||
| Effective tax rate due to change in enacted income tax rate (as a percent) | 4.80% | 1.10% | |||
| Unrecognized tax benefits | $ 122 | $ 122 | $ 124 | ||
| Reasonably possible decrease in unrecognized tax benefits | $ 66 | $ 66 | |||
| X | ||||||||||
- Definition Equity Method Investment, Lag Period No definition available.
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| X | ||||||||||
- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of realized and unrealized gain (loss) on investment. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition Amount of cash restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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