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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]  
SUPPLEMENTAL CASH FLOW INFORMATION
SUPPLEMENTAL CASH FLOW INFORMATION
(in millions)
 
2016
 
2015
 
2014
Cash (paid) for interest, net of amount capitalized
 
$
(411.9
)
 
$
(329.6
)
 
$
(241.4
)
Cash received (paid) for income taxes, net
 
39.7

 
(9.3
)
 
(22.0
)
Significant non-cash transactions:
 
 
 
 
 
 
Accounts payable related to construction costs
 
170.1

 
177.1

 
1.8

Restricted cash used to purchase investments held in the rabbi trust
 
59.2

 
60.2

 
—

Amortization of deferred revenue
 
24.7

 
39.9

 
55.7

Note receivable received related to the sale of AMP Trillium*
 
—

 
12.0

 
—

Capital assets received related to the sale of AMP Trillium *
 
—

 
6.3

 
—


*
ITF owned a 30% interest in AMP. See Note 3, Dispositions, for more information on the sale of ITF.

At December 31, 2016 and 2015, restricted cash of $33.6 million and $118.4 million, respectively, was recorded within other long-term assets on our balance sheets. The majority of this amount was held in the Integrys rabbi trust and represents a portion of the required funding that was triggered by the announcement of the Integrys acquisition. Withdrawals of restricted cash from the rabbi trust for qualifying payments are shown as an investing activity on the statements of cash flows. Decreases in restricted cash due to the purchase of restricted investments held in the rabbi trust are reflected as non-cash transactions on the statements of cash flows and are included in the table above.