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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2016 | Oct. 31, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Decrease (increase) in current assets: |  |  |  |
Receivables, net |  |  | $ (278) | $ 1,093
Inventories |  |  | 557 | (45)
Income taxes receivable |  |  | 165 | 88
Prepaid expenses and other |  |  | (28) | (11)
Increase (decrease) in current liabilities: |  |  |  |
Accounts payable |  |  | 494 | (1,007)
Accrued expenses |  |  | 46 | (5)
Taxes other than income taxes |  |  | 8 | (50)
Income taxes payable |  |  | (11) | (17)
Changes in current assets and current liabilities |  |  | 953 | 46
Cash Flows Related to Interest and Income Taxes |  |  |  |
Interest paid in excess of amount capitalized |  |  | 312 | 301
Income taxes paid, net |  |  | 305 | 1,532
Supplemental Cash Flow Elements (Textual) |  |  |  |
Treasury stock purchased but settled in subsequent quarter |  |  | 20 | 30
Stock purchases, shares |  | 506,100 |  |
Noncash equity transfer received - APIC |  |  | 68 |
Noncash equity transfer given - NCI |  |  | 68 |
Deferred tax liability on equity transfer |  |  | 25 |
Payment of long-term liability to joint venture partner |  |  | 143 | $ (50)
Owner-Method Joint Venture Investment [Member] |  |  |  |
Supplemental Cash Flow Elements (Textual) |  |  |  |
Payment of long-term liability to joint venture partner |  |  | $ 137 |
Subsequent Event [Member] |  |  |  |
Supplemental Cash Flow Elements (Textual) |  |  |  |
Stock purchases, shares | 382,935 |  |  |

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