Income Taxes - Provision For (Benefit From) Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Federal, Current	$ 369	$ 138	$ 570
State, Current	53	20	92
Foreign, Current	102	76	75
Total, Current	524	234	737
Federal, Deferred	(136)	85	(339)
State, Deferred	(28)	9	(76)
Foreign, Deferred	124	(12)	202
Total, Deferred	(40)	82	(213)
Total, Federal	233	223	231
Total, State	25	29	16
Total, Foreign	226	64	277
Total provision for (benefit from) income taxes	$ 484	$ 316	$ 524

Amount of current federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, current national tax expense (benefit) for non-US (United States of America) jurisdiction.

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