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Revenue Recognition - Contract with Customer, Asset and Liability (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Sep. 30, 2021
--- | --- | ---
Disaggregation of Revenue [Line Items] |  |
Contract liabilities - current | $ (1,768) | $ (1,637)
Accounts receivable - net |  |
Disaggregation of Revenue [Line Items] |  |
Contract assets - current | 2,020 | 1,718
Other noncurrent assets |  |
Disaggregation of Revenue [Line Items] |  |
Contract assets - noncurrent | 79 | 99
Deferred revenue |  |
Disaggregation of Revenue [Line Items] |  |
Contract liabilities - current | (1,768) | (1,637)
Other noncurrent liabilities |  |
Disaggregation of Revenue [Line Items] |  |
Contract liabilities - noncurrent | $ (282) | $ (269)

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