Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Operating Leases, Supplemental Cash Flow Information [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities – operating cash flows	$ 90	$ 106
ROU assets obtained in exchange for operating lease liabilities	23	55
Change in lease classification from operating to finance lease	230	338
Finance Leases, Supplemental Cash Flow Information [Abstract]
Interest paid for finance lease liabilities – Operating cash flows	4	5
Cash paid for amounts included in the measurement of finance lease obligations – financing cash flows	61	96
Total cash paid in the measurement of finance lease obligations	65	101
Capital expenditures through finance lease obligations	$ 17	$ 26