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Additional Financial Information (Details) $ / shares in Units, $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2024 USD ($) $ / shares | Dec. 31, 2023 USD ($) $ / shares
Dividends Payable [Line Items] |  |
Interest payments | $ 18 | $ 33
Income and withholding taxes paid | 43 | 39
Noncash acquisition activities | 18 | 18
Net gain on divestitures | 0 | $ 17
Pre-tax realized net gain on sale of an investment | $ 29 |
Debt instrument, covenant, total indebtedness to EBITDA ratio | 3.50 |
Dividends (in dollars per share) | $ / shares | $ 0.18 | $ 0.17
Dividends paid | $ 94 | $ 89
Dividends paid (in dollars per share) | $ / shares | $ 0.18 |
Class A Common Stock |  |
Dividends Payable [Line Items] |  |
Dividends (in dollars per share) | $ / shares | 0.18 |
Class B Common Stock |  |
Dividends Payable [Line Items] |  |
Dividends (in dollars per share) | $ / shares | $ 0.18 |

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