Share Repurchases (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jan. 30, 2022	Jan. 31, 2021	Jan. 30, 2022	Jan. 31, 2021
Statement [Line Items]
Treasury stock purchased, Shares			1.5
Shares repurchased, value	$ 2	$ 0	$ 65	$ 0
June 2021 Program
Statement [Line Items]
Authorized amount for shares repurchase	250		250
Shares repurchased, value			40
Stock Repurchase Program, Remaining Authorized Repurchase Amount	174		174
September 2021 Program
Statement [Line Items]
Authorized amount for shares repurchase	500		500
Shares repurchased, value			25
Stock Repurchase Program, Remaining Authorized Repurchase Amount	475		475
March 2017 Program - Canceled September 2021
Statement [Line Items]
Authorized amount for shares repurchase	$ 1,500		$ 1,500