Adoption of Updated Accounting Standards (Details) - USD ($) $ in Millions		12 Months Ended
	May 01, 2019	Apr. 30, 2018	Apr. 30, 2017	May 01, 2018	May 01, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption				$ (5)	$ 10
Deferred Income, Tax Benefit of Intercompany Transfer of Assets, Net of Amortization		$ 27
Deferred Tax Asset, Intra-entity Transfer, Asset Other than Inventory		7
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption					10
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption				(25)
Accounting Standards Update 2016-15 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Cash Provided by (Used in) Operating Activities		21	$ 17
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Cash Provided by (Used in) Investing Activities		(21)	(17)
Accounting Standards Update 2016-16 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption				20
Accounting Standards Update 2017-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Results		$ 9	$ 21
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption				$ (5)	$ 10
Scenario, Forecast [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Assets	$ 55
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Liabilities	55
Scenario, Forecast [Member] | Accounting Standards Update 2018-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect	$ 40