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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Aug. 03, 2019
Statement of Comprehensive Income [Abstract]      
Recognition of pension and other postretirement benefit obligations, tax (benefit) expense $ 52 $ (29) $ (11)
Recognition of interest rate swap cash flow hedges, tax expense (benefit) $ 13 $ (16) $ (23)