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Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2018
Supplemental Cash Flow Information [Abstract] |
Supplemental cash flow information |
| Nine Months Ended September 30,
| 2018 |  | 2017
| (in millions)
Cash payments for interest, net of amounts capitalized | $ | 416 |  |  | $ | 444 |
Net cash (receipts) payments for income taxes, net of refunds | (4 | ) |  | 39 |
Acquisition of subsidiary common stock included in accrued expenses and other liabilities | — |  |  | 51 |
Seller financing secured mortgages resulting from disposition of assets | — |  |  | 375 |
Capital expenditures included in accounts payable, accrued expenses and other liabilities | 11 |  |  | 8 |

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