Repurchase of Common Stock (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Jun. 05, 2019	May 04, 2019	May 05, 2018
Stock Repurchases [Line Items]
Total cost of shares repurchased		$ 106	$ 399
Number of shares repurchased		1.5	5.6
February 2019 Share Repurchase Program [Member]
Stock Repurchases [Line Items]
Stock Repurchase Program, Authorized Amount		$ 3,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 2,900
Subsequent Event [Member] | February 2019 Share Repurchase Program [Member]
Stock Repurchases [Line Items]
Total cost of shares repurchased	$ 80
Number of shares repurchased	1.2