Accumulated Other Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Apr. 27, 2025	Apr. 28, 2024	Apr. 27, 2025	Apr. 28, 2024	Jul. 28, 2024	Jul. 30, 2023
Balance, value		$ 3,912	$ 3,851	$ 3,796	$ 3,663
Other comprehensive income (loss), after-tax		1	8	2	(12)
Balance, value		3,872	3,915	3,872	3,915
Accumulated Other Comprehensive Income Foreign Currency Translation Tax (Benefit) Expense		0	0	0	0	$ 0	$ 0
Accumulated Other Comprehensive Income Cashflow Hedges Tax (Benefit) Expense		(2)	(3)	(2)	(3)	(2)	(1)
Accumulated Other Comprehensive Income Unamortized Pension And Post Retirement Tax (Benefit) Expense		2	1	2	1	$ 1	$ 1
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance, value	[1]			(10)	(1)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax				(1)	(6)
Other Comprehensive Income Reclassifications Current Period Net of Tax				0	0
Other comprehensive income (loss), after-tax				(1)	(6)
Balance, value	[1]	(11)	(7)	(11)	(7)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance, value	[2]			(9)	(4)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax				(2)	(5)
Other Comprehensive Income Reclassifications Current Period Net of Tax				0	(1)
Other comprehensive income (loss), after-tax				(2)	(6)
Balance, value	[2]	(11)	(10)	(11)	(10)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Balance, value	[3]			2	2
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax				5	0
Other Comprehensive Income Reclassifications Current Period Net of Tax				0	0
Other comprehensive income (loss), after-tax				5	0
Balance, value	[3]	7	2	7	2
AOCI Attributable to Parent [Member]
Balance, value		(16)	(23)	(17)	(3)
Other Comprehensive Income (Loss) Before Reclassifications Net Of Tax				2	(11)
Other Comprehensive Income Reclassifications Current Period Net of Tax				0	(1)
Other comprehensive income (loss), after-tax		1	8	2	(12)
Balance, value		$ (15)	$ (15)	$ (15)	$ (15)

[1] Included no tax as of April 27, 2025, July 28, 2024, April 28, 2024 and July 30, 2023.

[2] Included a tax benefit of $2 million as of April 27, 2025 and July 28, 2024, $3 million as of April 28, 2024 and $1 million as of July 30, 2023.

[3] Included tax expense of $2 million as of April 27, 2025, and $1 million as of July 28, 2024, April 28, 2024 and July 30, 2023.