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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Supplemental Cash Flow Information [Abstract] |
Schedule of supplemental cash flow information |
(in millions) |  | 2017 |  | 2016 |  | 2015
Cash (paid) for interest, net of amount capitalized |  | $ | (413.7 | ) |  | $ | (411.9 | ) |  | $ | (329.6 | )
Cash received (paid) for income taxes, net |  | 5.2 |  |  | 39.7 |  |  | (9.3 | )
Significant non-cash transactions: |  |  |  |  |  |
Accounts payable related to construction costs |  | 169.2 |  |  | 170.1 |  |  | 177.1 |
Increase (decrease) in restricted cash from the sale (purchase) of investments held in the rabbi trust |  | 4.6 |  |  | (59.2 | ) |  | (60.2 | )
Portion of Bostco real estate holdings sale financed with note receivable (1) |  | 7.0 |  |  | — |  |  | — |
Amortization of deferred revenue |  | 24.9 |  |  | 24.7 |  |  | 39.9 |
Note receivable received related to the sale of AMP Trillium LLC (2) |  | — |  |  | — |  |  | 12.0 |
Capital assets received related to the sale of AMP Trillium LLC (2) |  | — |  |  | — |  |  | 6.3 |
(1) | See Note 3, Dispositions, for more information on this sale.
(2) | ITF owned a 30% interest in AMP Trillium LLC. See Note 3, Dispositions, for more information on the sale of ITF.

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