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Note 2. Acquisitions (Details) - USD ($) $ in Millions | 3 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |
Goodwill, Purchase Accounting Adjustments | $ 4 |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest | 69 | $ 192
GAAS [Member] |  |
Business Acquisition [Line Items] |  |
Revenues | 89 |
Futuris [Member] |  |
Business Acquisition [Line Items] |  |
Revenues | $ 120 |

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