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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

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