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Stockholders' Equity (Tables) | 9 Months Ended
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Jun. 30, 2018
Equity [Abstract] |
Schedule of Activity in Noncontrolling Interests | The following table illustrates the noncontrolling interest activity for the periods presented:
|  | Nine Months Ended June 30 |
|  | 2018 |  |  | 2017 |
|  | (In millions) |
Noncontrolling interests at beginning of period |  | $ | 121 |  |  | $ | 98 |
Net income (loss) attributable to noncontrolling interests |  |  | 31 |  |  |  | 18 |
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax |  |  | — |  |  |  | — |
Dividends declared to noncontrolling interests |  |  | (22 | ) |  |  | (14 | )
Contribution from noncontrolling interest |  |  | — |  |  |  | 2 |
Noncontrolling interests at end of period |  | $ | 130 |  |  | $ | 104 |

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