COMPREHENSIVE (LOSS) INCOME AND ACCUMULATED OTHER COMPREHENSIVE LOSS COMPREHENSIVE (LOSS) INCOME AND ACCUMULATED OTHER COMPREHENSIVE LOSS - Changes by component (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Feb. 01, 2020	Jan. 26, 2019	Feb. 01, 2020	Jan. 26, 2019
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		$ 1,123,240	$ 1,830,316	$ 1,510,934	$ 1,845,955
Amortization of amounts included in net periodic benefit income	[1]	(7,370)	0	(7,942)	0
Net current period Other comprehensive income (loss)		3,271	(11,208)	533	(11,684)
Ending Balance		1,099,094	1,483,368	1,099,094	1,483,368
Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance				(32,458)
Other comprehensive gain (loss) before reclassifications				1,480
Amortization of amounts included in net periodic benefit income				(1,148)
Amortization of cash flow hedge				0
Pension settlement charge				7,610
Net current period Other comprehensive income (loss)				7,942
Ending Balance		(24,516)		(24,516)
Foreign Currency
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance				(20,082)	(19,053)
Other comprehensive gain (loss) before reclassifications				24	(982)
Amortization of amounts included in net periodic benefit income				0
Amortization of cash flow hedge				0	0
Pension settlement charge				0
Net current period Other comprehensive income (loss)				24	(982)
Ending Balance		(20,058)	(20,035)	(20,058)	(20,035)
Swap Agreements
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance				(56,413)	4,874
Other comprehensive gain (loss) before reclassifications				(2,588)	(11,035)
Amortization of amounts included in net periodic benefit income				0
Pension settlement charge				0
Net current period Other comprehensive income (loss)				(7,433)
Ending Balance		(63,846)	(5,828)	(63,846)	(5,828)
AOCI Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance		(111,691)	(14,655)	(108,953)	(14,179)
Other comprehensive gain (loss) before reclassifications				(1,084)	(12,017)
Amortization of amounts included in net periodic benefit income				(1,148)
Amortization of cash flow hedge				(4,845)	333
Pension settlement charge				7,610
Net current period Other comprehensive income (loss)		3,271	(11,208)	533	(11,684)
Ending Balance		$ (108,420)	$ (25,863)	$ (108,420)	$ (25,863)

[1] Amounts are net of tax (benefit) expense of $2.4 million, $0.0 million, $2.6 million and $0.0 million, respectively.