Employee Benefit Plans (Tables)

12 Months Ended

Mar. 31, 2024

Retirement Benefits [Abstract]

Schedule of Consolidated Defined Benefit Pension Plans

The following tables set forth the Company's consolidated defined benefit pension plans for its union and non-union employees as of March 31, 2024 and 2023, and the amounts recorded on the consolidated balance sheets at March 31, 2024 and 2023. Company contributions include amounts contributed directly to plan assets and indirectly as benefits paid from the Company's assets. Benefit payments reflect the total benefits paid from the plans and the Company's assets. Information on the plans includes both the domestic qualified and nonqualified plans and the foreign qualified plans.

	Pension Benefits
	Year ended March 31,
	2024			2023
Change in projected benefit obligations
Projected benefit obligation at beginning of year	$	1,660,423		$	1,946,201
Service cost		408			638
Interest cost		80,492			65,069
Actuarial gain		(34,360	)		(185,210	)
Participant contributions		117			115
Benefits paid		(149,891	)		(163,614	)
Currency translation adjustment		591			(2,776	)
Projected benefit obligation at end of year	$	1,557,780		$	1,660,423
Accumulated benefit obligation at end of year	$	1,557,533		$	1,659,607
Assumptions used to determine benefit    obligations at end of year
Discount rate	5.09 - 5.38%			5.09 - 5.19%
Rate of compensation increase	3.93%			3.92%

Schedule of Change in Fair Value of Plan Assets

	Pension Benefits
	Year ended March 31,
	2024			2023
Change in fair value of plan assets
Fair value of plan assets at beginning of year	$	1,306,456		$	1,649,241
Actual return on plan assets		82,565			(177,419	)
Participant contributions		117			115
Company contributions		40,239			1,100
Benefits paid		(149,890	)		(163,615	)
Currency translation adjustment		704			(2,966	)
Fair value of plan assets at end of year	$	1,280,191		$	1,306,456
Funded status (underfunded)
Funded status	$	(277,589	)	$	(353,967	)
Reconciliation of amounts recognized on the    consolidated balance sheets
Pension asset—noncurrent	$	5,953		$	5,124
Accrued benefit liability—current		(757	)		(768	)
Accrued benefit liability—noncurrent		(282,785	)		(358,323	)
Net amount recognized	$	(277,589	)	$	(353,967	)

	Pension Benefits						Other Postretirement Benefits
	Year ended March 31,						Year ended March 31,
	2024			2023			2024			2023
Reconciliation of amounts recognized in    accumulated other comprehensive income
Prior service costs (credits)	$	1,254		$	1,356		$	(38,795	)	$	(43,900	)
Actuarial losses (gains)		714,855			756,664			(41,678	)		(45,347	)
Income tax (benefits) expenses related to above items		(204,132	)		(204,132	)		42,016			42,016
Unamortized benefit plan costs (gains)	$	511,977		$	553,888		$	(38,457	)	$	(47,231	)

Schedule of Components of Net Periodic Benefit Cost

The components of net periodic benefit cost for fiscal years ended March 31, 2024, 2023, and 2022, are as follows:

	Pension Benefits
	Year Ended March 31,
	2024			2023			2022
Components of net periodic pension    cost
Service cost	$	408		$	638		$	745
Interest cost		80,492			65,069			46,891
Expected return on plan assets		(105,039	)		(121,195	)		(133,540	)
Amortization of prior service cost		102			102			260
Amortization of net loss		30,099			30,859			38,407
Curtailment loss		—			—			16,024
Settlements		—			—			35,927
Special termination benefits		—			—			54
Total net periodic benefit expense (income)	$	6,062		$	(24,527	)	$	4,768
Assumptions used to determine net    periodic pension cost
Discount rate	5.09 - 5.19%			2.66% - 3.93%			1.75% - 3.47%
Expected long-term rate of return on plan assets	5.75 - 8.00%			5.75 - 8.00%			1.41 - 8.00%
Rate of compensation increase		3.92	%	3.50 - 4.22%			2.80 - 3.50%

Schedule of Estimated Future Benefit Payments from Plan Assets

The total estimated future benefit payments for the pension plans are expected to be paid from the plan assets and company funds. Estimated future benefit payments from plan assets and Company funds for the next ten fiscal years are as follows:

Year	Pension Benefits
2025	$	155,839
2026		141,299
2027		137,467
2028		133,892
2029		129,551
2030 - 2034		588,180

Schedule of Allocation of Plan Assets

The table below sets forth the Company's target asset allocation for fiscal 2024 and the actual asset allocations at March 31, 2024 and 2023.

		Actual Allocation
	Target Allocation	March 31,
Asset Category	Fiscal 2024	2024			2023
Equity securities	50% - 60%		58	%		55	%
Fixed income securities	30% - 40%		31			34
Alternative investment funds	0% - 10%		10			10
Other	0% - 5%		1			1
Total			100	%		100	%

The tables below provide the fair values of the Company's plan assets at March 31, 2024 and 2023, by asset category. The table also identifies the level of inputs used to determine the fair value of assets in each category (refer to Note 2 for definition of levels).

	March 31, 2024
		Level 1		Level 2		Level 3		Total
Assets
Cash and cash equivalents		$	18,974	$	—	$	—	$	18,974
Equity securities
International			107,551		—		—		107,551
U.S. equity			10,012		—		—		10,012
U.S. commingled fund			438,146		—		—		438,146
International commingled fund			30,618		—		—		30,618
Fixed income securities
Corporate bonds			—		13,025		—		13,025
Government securities			—		336,706		—		336,706
Other
Insurance contracts			—		—		613		613
Total investment in securities—assets		$	605,301	$	349,731	$	613	$	955,645
U.S. equity commingled fund									17,729
International equity commingled fund									133,851
U.S. fixed income commingled fund									34,098
International fixed income commingled fund									2,070
Government securities commingled fund									8,760
Private equity and infrastructure									126,351
Other									60
Total investment measured at NAV as a    practical expedient								$	322,919
Receivables									2,462
Payables									(835	)
Total plan assets								$	1,280,191

	March 31, 2023
	Level 1		Level 2		Level 3		Total
Assets
Cash and cash equivalents	$	17,163	$	—	$	—	$	17,163
Equity securities
International		100,370		—		—		100,370
U.S. equity		3,190		—		—		3,190
U.S. commingled fund		417,307		—		—		417,307
International commingled fund		30,977		—		—		30,977
Fixed income securities
Corporate bonds		—		12,904		—		12,904
Government securities		—		361,070		—		361,070
Other
Insurance contracts		—		—		626		626
Total investment in securities—assets	$	569,007	$	373,974	$	626	$	943,607
U.S. equity commingled fund								2,866
International equity commingled fund								161,458
U.S. fixed income commingled fund								44,861
International fixed income commingled fund								7,070
Government securities commingled fund								14,599
Private equity and infrastructure								126,549
Other								3,592
Total investment measured at NAV as a    practical expedient							$	360,995
Receivables								2,288
Payables								(434	)
Total plan assets							$	1,306,456

Schedule of Effect of Twenty Five Basis-Point Change in Discount Rates

The effect of a 25 basis-point change in discount rates as of March 31, 2024, is shown below:

		Pension Benefits
Increase of 25 basis points
Obligation	*	$	(31,238	)
Net periodic expense			140
Decrease of 25 basis points
Obligation	*	$	32,433
Net periodic expense			(165	)

* Excludes impact to plan assets due to the LDI investment approach discussed above under "Plan Assets, Investment Policy and Strategy."