Postretirement Benefit Plans - Additional Information (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Net actuarial gains (losses), amortization periods | 15 years | |
| Expected long-term rate of return on plan assets | 6.30% | |
| Maximum amortization period of unfunded actuarial liability | 15 years | |
| Expected additional contribution to funded pension plan | $ 22 | |
| Expected additional contribution to unfunded pension plan | 15 | |
| Expected additional contribution to savings and defined contribution plans | 47 | |
| Pension Benefit Plans | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Settlement and curtailment gain | 0 | $ 0 |
| Other Benefit Plans | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Settlement and curtailment gain | $ 0 | $ 11 |
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- Definition Additional contributions to funded pension plan. No definition available.
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- Definition Additional contributions to unfunded pension plan. No definition available.
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- Definition Net Actuarial Gains (Losses), Amortization Periods No definition available.
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- Definition Unfunded Actuarial Liability, Maximum Amortization Period No definition available.
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- Definition Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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 of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. No definition available.
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- Details
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