Income Taxes (Detail) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Income Tax Disclosure [Abstract] | ||
| QCCV tax credits | $ 73 | |
| Effective income tax rate (percentage) | 26.80% | 31.00% |
| Accumulated undistributed earnings of HCFI | $ 1,000 | |
| Unrecognized deferred tax liability from undistributed foreign earnings | $ 109 | |
| X | ||||||||||
- Definition Deferred Qualified Commercial Clean Vehicles Tax Credit No definition available.
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| X | ||||||||||
- Definition Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- 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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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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