Postretirement Benefit Plans - Additional Information (Details) $ in Millions |
3 Months Ended |
---|---|
Jun. 30, 2024
USD ($)
| |
Retirement Benefits [Abstract] | |
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 | $ 15 |
Expected additional contribution to unfunded pension plan | 13 |
Expected additional contribution to savings and defined contribution plans | $ 43 |