CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jan. 30, 2021	Feb. 01, 2020	Jan. 30, 2021	Feb. 01, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss) including noncontrolling interests		$ 60,565	$ (30,060)	$ 60,889	$ (413,468)
Other comprehensive income (loss):
Recognition of pension and other postretirement benefit obligations, net of tax	[1]	(300)	7,370	(506)	7,942
Recognition of interest rate swap cash flow hedges, net of tax	[2]	9,253	(3,752)	21,711	(7,433)
Foreign currency translation adjustments		2,852	(347)	3,257	24
Recognition of other cash flow derivatives, net of tax	[3]	388	0	(45)	0
Total other comprehensive income		12,193	3,271	24,417	533
Less comprehensive income attributable to noncontrolling interests		(1,605)	(650)
Total comprehensive income (loss) attributable to United Natural Foods, Inc.		$ 71,153	$ (27,439)	$ 82,334	$ (414,104)

[1] Amounts are net of tax (benefit) expense of $(0.1) million, $2.4 million, $(0.2) million and $2.6 million, respectively.

[2] Amounts are net of tax expense (benefit) of $3.2 million, $(1.3) million, $7.4 million and $(2.5) million, respectively.

[3] Amounts are net of tax expense of $0.1 million, $— million, $— million and $— million, respectively.