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Revenue Recognition - Contract with Customer, Asset and Liability (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 2,470	$ 2,160
Accounts receivable - net
Disaggregation of Revenue [Line Items]
Contract assets - current	2,178	1,931
Other noncurrent assets
Disaggregation of Revenue [Line Items]
Contract assets - noncurrent	9	11
Deferred revenue
Disaggregation of Revenue [Line Items]
Deferred revenue	2,470	2,160
Other noncurrent liabilities
Disaggregation of Revenue [Line Items]
Contract liabilities - noncurrent	$ 478	$ 252

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

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