CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Aug. 03, 2019	Jul. 28, 2018	Jul. 29, 2017
Statement of Comprehensive Income [Abstract]
Net (loss) income including noncontrolling interests		$ (284,883)	$ 165,670	$ 130,155
Other comprehensive (loss) income:
Recognition of pension and other postretirement benefit obligations, net of tax	[1]	(32,458)	0	0
Recognition of interest rate swap cash flow hedges, net of tax	[2]	(61,287)	3,575	4,879
Foreign currency translation adjustments		(1,029)	(3,791)	3,537
Total other comprehensive (loss) income		(94,774)	(216)	8,416
Less comprehensive (income) loss attributable to noncontrolling interests		(107)	0	0
Total comprehensive (loss) income attributable to United Natural Foods, Inc.		(379,764)	165,454	138,571
Pension benefit obligations, tax (benefit) expense		(11,300)	0	0
Derivatives qualifying as hedges, tax (benefit) expense		$ (22,500)	$ 1,500	$ 3,200

[1] Amounts are net of tax (benefit) expense of $(11.3) million, $0 million and $0 million for the fiscal years ended August 3, 2019, July 28, 2018 and July 29, 2017, respectively.

[2] Amounts are net of tax (benefit) expense of $(22.5) million, $1.5 million and 3.2 million for the fiscal years ended August 3, 2019, July 28, 2018 and July 29, 2017, respectively.