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Comprehensive Income (Loss) (Tables)
12 Months Ended
Jul. 31, 2021
Equity [Abstract]  
Components of AOCI, Net of Tax
The components of AOCI, net of tax, and the other comprehensive income (loss) are summarized as follows (in millions):
Net Unrealized Gains (Losses) on Available-for-Sale InvestmentsNet Unrealized Gains (Losses) Cash Flow Hedging InstrumentsCumulative Translation Adjustment and Actuarial Gains and LossesAccumulated Other Comprehensive Income (Loss)
BALANCE AT JULY 28, 2018$(310)$(11)$(528)$(849)
Other comprehensive income (loss) before reclassifications560 — (267)293 
(Gains) losses reclassified out of AOCI13 (3)12 
Tax benefit (expense)(95)— 15 (80)
Total change for the period478 (3)(250)225 
Effect of adoption of accounting standard(168)— — (168)
BALANCE AT JULY 27, 2019— (14)(778)(792)
Other comprehensive income (loss) before reclassifications420 (51)376 
(Gains) losses reclassified out of AOCI(42)(35)
Tax benefit (expense)(63)— (5)(68)
BALANCE AT JULY 25, 2020315 (6)(828)(519)
Other comprehensive income (loss) before reclassifications(141)20 229 108 
(Gains) losses reclassified out of AOCI(53)(14)3 (64)
Tax benefit (expense)61 (1)(2)58 
BALANCE AT JULY 31, 2021$182 $(1)$(598)$(417)