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Employee Benefit Plans
 12 Months Ended
Mar. 31, 2025
Retirement Benefits [Abstract]  
Employee Benefit Plans Employee Benefit Plans
Defined Contribution Plan
The Company sponsors the Employees’ Capital Accumulation Plan (the “ECAP”), which is a qualified defined contribution plan that covers eligible U.S. and certain international employees. ECAP provides for distributions to participants by reason of retirement, death, disability, or termination of employment. The Company provides an annual matching contribution of up to 6% of eligible annual compensation. Total expense recognized under ECAP for fiscal 2025, 2024, and 2023 was $249 million, $218 million, and $191 million, respectively, and the Company-paid contributions were $240 million, $213 million, and $186 million, respectively.
Post Retirement Benefits
The Company provides postretirement healthcare benefits to former officers under a medical indemnity insurance plan, with premiums paid by the Company. This plan is referred to as the Officer Medical Plan. The Company recognizes a liability for the defined benefit plans' underfunded status, measures the defined benefit plans' obligations that determine its funded status as of the end of the fiscal year, and recognizes as a component of accumulated other comprehensive income the changes in the defined benefit plans' funded status that are not recognized as components of net periodic benefit cost. See Note 15, “Accumulated Other Comprehensive Income (Loss),” to the consolidated financial statements.
The service cost component of net periodic benefit cost is included in cost of revenue and general and administrative expenses, and the non-service cost components of net periodic benefit cost (interest cost and net actuarial loss) are included as part of other income (expense), net in the accompanying consolidated statements of operations.
The weighted-average discount rate used to determine the year-end benefit obligation for the Officer Medical Plan were 5.55%, 5.20% and 4.90% for fiscal 2025, 2024, and 2023, respectively.
Assumed healthcare cost trend rates for the Officer Medical Plan at March 31 were as follows:    
Pre-65 initial rate20252024
Healthcare cost trend rate assumed for next year8.25 %7.25 %
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)4.50 %4.50 %
Year that the rate reaches the ultimate trend rate20342033
Post-65 initial rate20252024
Healthcare cost trend rate assumed for next year8.95 %7.50 %
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)4.50 %4.50 %
Year that the rate reaches the ultimate trend rate20342033
The changes in the benefit obligation of the unfunded Officer Medical Plan were as follows: 
 Fiscal Year Ended March 31,
 202520242023
Benefit obligation, beginning of the year (1)
$127 $106 $114 
Service cost6 5 6 
Interest cost6 5 4 
Net actuarial loss (gain)41 17 (14)
Benefits paid(6)(6)(4)
Benefit obligation, end of the year (1)
$174 $127 $106 
(1) The short term and long term portion of the Officer Medical Plan’s benefit obligation is included in accrued compensation and other long-term liabilities, respectively, in the accompanying consolidated balance sheets.
The net actuarial loss related to the benefit obligation in fiscal 2025 was primarily due to unfavorable updates in estimated medical claims and medical inflation, partially offset by an increase in the discount rate. The net actuarial loss related to the benefit obligation in fiscal 2024 was primarily due to unfavorable updates in estimated medical claims, medical inflation, and demographic assumptions, partially offset by increases in discount rates. The net actuarial gain related to the benefit obligation in fiscal 2023 was primarily due to a favorable change from using an amounts-weighted to a headcount-weighted mortality table and increases in discount rates, partially offset by updates to estimated medical costs and the outlook of higher future medical inflation.
The expected future medical benefit payments and related contributions are as follows: 
For the Fiscal Year Ending March 31,
2026$7 
20277 
20288 
20299 
203010 
2031 - 203560 
Total $101