Fair Value Measurements Fair Value Measurements Narrative (Details) - USD ($) $ in Millions	Apr. 30, 2023	Jul. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value	$ 9	$ 27
Debt, Long-term and Short-term, Combined Amount	4,759	4,810
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, Fair Value Disclosure	9	27
Debt Instrument, Fair Value Disclosure	$ 4,459	$ 4,637