Financing Arrangement (Senior Notes) (Details) - USD ($) $ in Millions			9 Months Ended
	Feb. 01, 2021	Feb. 04, 2016	Dec. 31, 2020	Mar. 31, 2020		Feb. 24, 2016
Debt Instrument [Line Items]
Proceeds from Issuance of Senior Long-term Debt		$ 989
Senior Notes, Noncurrent			$ 397	$ 397	[1]
Senior Notes			$ 997	996
2021 Notes
Debt Instrument [Line Items]
Long-term Debt						$ 600
Debt Instrument, Interest Rate, Stated Percentage						3.70%
Debt Instrument, Maturity Date		Mar. 01, 2021
Effective interest rate						3.94%
Debt Instrument, Convertible, Remaining Discount Amortization Period			2 months 12 days
2021 Notes | Subsequent Event [Member]
Debt Instrument [Line Items]
Repayments of Unsecured Debt	$ 600
Debt Instrument, Redemption Period, End Date	Feb. 01, 2021
Debt Instrument, Periodic Payment, Interest	$ 9
2026 Notes
Debt Instrument [Line Items]
Long-term Debt						$ 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			5 years 2 months 12 days
Senior Notes
Debt Instrument [Line Items]
Long-term Debt						$ 1,000
Debt Instrument, Unamortized Discount (Premium), Net			$ (1)	(1)		(2)
Debt Issuance Costs, Noncurrent, Net			(2)	(3)		$ (9)
Senior Notes, Frequency of Periodic Payment		semiannually
Debt Instrument, Fair Value Disclosure			$ 1,078	$ 1,030
Debt Instrument, Redemption Price, Percentage			100.00%
Change of control repurchase event
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage			101.00%

[1] Derived from audited Consolidated Financial Statements.