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Income Taxes (Tables) | 12 Months Ended
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Mar. 31, 2025
Income Tax Disclosure [Abstract] |
Summary of Components of Income Tax Expense | The components of income tax expense were as follows:
|  | Fiscal Year Ended March 31,
|  | 2025 |  | 2024 |  | 2023
Current |  |  |  |  |  |
U.S. Federal |  | $ | 280 |  |  | $ | 229 |  |  | $ | 355 |
State and local |  | 90 |  |  | 117 |  |  | 87 |
Foreign |  | 5 |  |  | 3 |  |  | 9 |
Total current |  | 375 |  |  | 349 |  |  | 451 |
Deferred |  |  |  |  |  |
U.S. Federal |  | (73) |  |  | (94) |  |  | (300) |
State and local |  | (18) |  |  | (6) |  |  | (50) |
Foreign |  | — |  |  | (1) |  |  | (4) |
Total deferred |  | (91) |  |  | (101) |  |  | (354) |
Total |  | $ | 284 |  |  | $ | 248 |  |  | $ | 97 |
Schedule of Effective Income Tax Rate Reconciliation | A reconciliation of the provision for income tax to the amount computed by applying the statutory federal income tax rate to income from continuing operations before income taxes for each of the three years ended March 31 is as follows:
|  | Fiscal Year Ended March 31,
|  | 2025 |  | 2024 |  | 2023
Income tax expense computed at U.S. federal statutory rate |  | $ | 256 |  |  | $ | 179 |  |  | $ | 77 |
Increases (reductions) resulting from: |  |  |  |  |  |
State and local income taxes, net of federal tax |  | 55 |  |  | 85 |  |  | 33 |
Foreign income taxes, net of federal tax |  | — |  |  | (8) |  |  | 5 |
Non-deductible expenses, including non-deductible penalties |  | 7 |  |  | 5 |  |  | 35 |
Excess tax benefits from stock-based compensation |  | (6) |  |  | (10) |  |  | (5) |
Research and development and other federal credits |  | (40) |  |  | (31) |  |  | (33) |
Executive compensation -162(m) |  | 7 |  |  | 6 |  |  | 4 |
Foreign-Derived Intangible Income (FDII) |  | (13) |  |  | (14) |  |  | (16) |
Changes in uncertain tax positions (including indirect effects) |  | 27 |  |  | 38 |  |  | (6) |
Other |  | (9) |  |  | (2) |  |  | 3 |
Income tax expense from operations |  | $ | 284 |  |  | $ | 248 |  |  | $ | 97 |
Schedule of Components of Income Tax Receivables and Payables | The Company has both income tax receivables and income tax payable on its consolidated balance sheet as follows:
|  | March 31,
|  | 2025 |  | 2024
Current income tax receivable |  | $ | 76 |  |  | $ | 47 |
Long term income tax receivable |  | $ | 152 |  |  | $ | 152 |
Current income tax payable |  | $ | 10 |  |  | $ | 11 |
Schedule of Components of Deferred Tax Assets and Liabilities | The significant components of the Company’s deferred income tax assets and liabilities were as follows:
|  | March 31,
|  | 2025 |  | 2024
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 |  |  | — |
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 |
Schedule of Unrecognized Tax Benefits | A reconciliation of the beginning and ending amount of potential tax benefits for the periods presented is as follows:
|  | March 31,
|  | 2025 |  | 2024 |  | 2023
Beginning of year |  | $ | 104 |  |  | $ | 548 |  |  | $ | 79 |
Increases in prior year position |  | 4 |  |  | 41 |  |  | — |
Increases in current year position |  | 17 |  |  | 13 |  |  | 470 |
Decreases in prior year position |  | — |  |  | (474) |  |  | (1) |
Settlements with taxing authorities |  | — |  |  | (24) |  |  | — |
Lapse of statute of limitations |  | — |  |  | — |  |  | — |
End of year |  | $ | 125 |  |  | $ | 104 |  |  | $ | 548 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-9 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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