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Nonconsolidated Partially-Owned Affiliates Summarized Balance Sheet Data (Detail) - Equity Method Investments - USD ($) $ in Millions | Sep. 30, 2019 | Sep. 30, 2018
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Equity Method Investments, Summarized Balance Sheet Information [Line Items] |  |
Current Assets | $ 2,941 | $ 3,134
Noncurrent assets | 1,020 | 804
Total assets | 3,961 | 3,938
Current liabilities | 2,135 | 2,111
Noncurrent liabilities | 157 | 150
Noncontrolling interests | 67 | 39
Shareholders' equity | 1,602 | 1,638
Total liabilities and shareholders' equity | $ 3,961 | $ 3,938

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