Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Mar. 31, 2025
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 151	$ 136	$ 594	$ 378
Effective tax rate	24.00%	24.00%	24.00%	24.00%
Net deferred income tax liability	$ 3,600		$ 3,600		$ 3,000