CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Feb. 01, 2020	Jan. 26, 2019	Feb. 01, 2020	Jan. 26, 2019
Statement of Comprehensive Income [Abstract]
Net loss including noncontrolling interests		$ (30,060)	$ (341,896)	$ (413,468)	$ (361,187)
Other comprehensive (loss) income:
Recognition of pension and other postretirement benefit obligations, net of tax	[1]	7,370	0	7,942	0
Recognition of interest rate swap cash flow hedges, net of tax	[2]	(3,752)	(10,898)	(7,433)	(10,702)
Foreign currency translation adjustments		(347)	(310)	24	(982)
Total other comprehensive income (loss)		3,271	(11,208)	533	(11,684)
Less comprehensive (income) loss attributable to noncontrolling interests		(650)	171	(1,169)	168
Total comprehensive loss attributable to United Natural Foods, Inc.		$ (27,439)	$ (352,933)	$ (414,104)	$ (372,703)

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

[2] Amounts are net of tax (benefit) expense of $(1.3) million, $(3.9) million, $(2.5) million and $(4.0) million, respectively.