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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Supplemental Cash Flow Information [Abstract] |
Net Effect of Changes in Operating Assets and Liabilities | The following table provides information regarding the net effect of changes in our operating accounts and cash payments for interest and income taxes for the periods indicated:
|  | For the Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Decrease (increase) in: |  |  |  |  |  |  |  |  |
Accounts receivable – trade |  | $ | (1,076.2 | ) |  | $ | (679.0 | ) |  | $ | 1,279.3 |
Accounts receivable – related parties |  |  | (0.7 | ) |  |  | 0.4 |  |  |  | 1.3 |
Inventories |  |  | 194.6 |  |  |  | (871.8 | ) |  |  | (72.7 | )
Prepaid and other current assets |  |  | 226.0 |  |  |  | (49.3 | ) |  |  | (59.1 | )
Other assets |  |  | (111.0 | ) |  |  | (2.0 | ) |  |  | (5.8 | )
Increase (decrease) in: |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable – trade |  |  | 66.6 |  |  |  | (21.5 | ) |  |  | (52.9 | )
Accounts payable – related parties |  |  | 56.0 |  |  |  | 21.0 |  |  |  | (34.8 | )
Accrued product payables |  |  | 952.3 |  |  |  | 1,193.3 |  |  |  | (1,342.4 | )
Accrued interest |  |  | 17.3 |  |  |  | (11.4 | ) |  |  | 16.5 |
Other current liabilities |  |  | (291.4 | ) |  |  | 189.9 |  |  |  | (67.1 | )
Other liabilities |  |  | (1.3 | ) |  |  | 49.5 |  |  |  | 14.4 |
Net effect of changes in operating accounts |  | $ | 32.2 |  |  | $ | (180.9 | ) |  | $ | (323.3 | )
Cash payments for interest, net of $192.1, $168.2 and $149.1 capitalized in 2017, 2016 and 2015, respectively |  | $ | 912.1 |  |  | $ | 947.9 |  |  | $ | 911.6 |
Cash payments for federal and state income taxes |  | $ | 20.9 |  |  | $ | 18.7 |  |  | $ | 17.5 |
Schedule of Significant Acquisitions and Disposals | The following table presents our cash proceeds from asset sales for the periods indicated:
|  | For the Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Sale of Offshore Business (see Note 10) |  | $ | -- |  |  | $ | -- |  |  | $ | 1,527.7 |
Cash proceeds from other asset sales |  |  | 40.1 |  |  |  | 46.5 |  |  |  | 80.9 |
Total |  | $ | 40.1 |  |  | $ | 46.5 |  |  | $ | 1,608.6 |
The following table presents net gains (losses) attributable to asset sales for the periods indicated:
|  | For the Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Sale of Offshore Business (see Note 10) |  | $ | -- |  |  | $ | -- |  |  | $ | (12.3 | )
Net gains (losses) attributable to other asset sales |  |  | 10.7 |  |  |  | 2.5 |  |  |  | (3.3 | )
Total |  | $ | 10.7 |  |  | $ | 2.5 |  |  | $ | (15.6 | )

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