Income Taxes - Components of Net Deferred Income Taxes (Details) - USD ($) $ in Millions |
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Deferred income tax assets: | ||
| Accrued expenses | $ 66 | $ 103 |
| Deferred compensation | 59 | 54 |
| Stock-based compensation | 12 | 11 |
| Postretirement benefits | 47 | 35 |
| Net operating loss and other carryforwards | 9 | 10 |
| Research and development expenditures and indirect effects | 335 | 248 |
| State tax credits | 1 | 0 |
| Operating lease liabilities | 62 | 64 |
| Other | 12 | 10 |
| Total gross deferred income tax assets | 603 | 535 |
| Less: Valuation allowance | (9) | (8) |
| Total net deferred income tax assets | 594 | 527 |
| Deferred income tax liabilities: | ||
| Unbilled receivables | (89) | (132) |
| Intangible assets | (100) | (93) |
| Property and equipment | (25) | (26) |
| Operating lease right-of-use assets | (46) | (45) |
| Other | (2) | (4) |
| Total deferred income tax liabilities | (262) | (300) |
| Net deferred income tax asset | $ 332 | $ 227 |
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- Definition Deferred Tax Assets, Net Operating Loss & Capital Loss Carryforwards No definition available.
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- Definition Deferred Tax Assets, Operating Lease, Liability No definition available.
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- Definition Deferred Tax Assets, Research And Development Expenditures And Indirect Effects No definition available.
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- Definition Deferred Tax Assets, Tax Credit Carryforwards, State No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from unbilled current accounts receivable. No definition available.
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- Definition Deferred Tax Liabilities, Operating Lease, Right-of-Use Asset No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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