Financing Arrangement (Senior Notes) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Feb. 04, 2016	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Mar. 31, 2022	Feb. 28, 2022	Feb. 11, 2021	Feb. 24, 2016
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt	$ 395
Amortization of Debt Discount (Premium)		$ 6
Interest Expense		14	$ 14	$ 43	$ 43
Senior Notes		1,879		1,879		$ 1,878
Proceeds from Debt, Net of Issuance Costs				1,478
Debt Issuance Costs, Gross		16		16
2026 Notes
Debt Instrument [Line Items]
Long-term Debt		400		$ 400		400			$ 400
Debt Instrument, Interest Rate, Stated Percentage									4.80%
Debt Instrument, Maturity Date	Mar. 01, 2026
Effective interest rate									4.97%
Debt Instrument, Convertible, Remaining Discount Amortization Period				3 years 2 months 12 days
Senior Notes
Debt Instrument [Line Items]
Long-term Debt		1,900		$ 1,900		1,900
Debt Instrument, Unamortized Discount (Premium), Net		(6)		(6)		(6)			$ (1)
Debt Issuance Costs, Noncurrent, Net		15		15		16			$ 4
Senior Notes, Frequency of Periodic Payment	semiannually
Debt Instrument, Fair Value Disclosure		1,477		$ 1,477		1,711
Debt Instrument, Redemption Price, Percentage				100.00%
Change of control repurchase event
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				101.00%
2031 Notes
Debt Instrument [Line Items]
Long-term Debt		750		$ 750		750		$ 750
Debt Instrument, Interest Rate, Stated Percentage								1.85%
Debt Instrument, Maturity Date				Feb. 15, 2031
Effective interest rate							1.98%
Debt Instrument, Convertible, Remaining Discount Amortization Period				8 years 1 month 6 days
2051 Notes
Debt Instrument [Line Items]
Long-term Debt		$ 750		$ 750		$ 750		$ 750
Debt Instrument, Interest Rate, Stated Percentage								2.95%
Debt Instrument, Maturity Date				Feb. 15, 2051
Effective interest rate							3.04%
Debt Instrument, Convertible, Remaining Discount Amortization Period				28 years 1 month 6 days