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SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
 3 Months Ended
Mar. 31, 2018
Supplemental Cash Flow Information [Abstract]  
Schedule of supplemental cash flow information
 
 
Three Months Ended March 31
(in millions)
 
2018
 
2017
Cash (paid) for interest, net of amount capitalized
 
$
(4.7
)
 
$
(4.8
)
Cash (paid) for income taxes, net
 
—

 
(52.1
)
Significant noncash transactions:
 
 
 
 
Accounts payable related to construction costs
 
7.3

 
11.0

Transfer of investment in ATC to another subsidiary of WEC Energy Group (1) (2)
 
—

 
415.4

Transfer of net assets to UMERC (1)
 
—

 
68.9

Accounts receivable related to the sale of Bostco real estate holdings (3)
 
—

 
7.0


(1)
See Note 14, Related Parties, for more information on these transactions.

(2)
The amount transferred included a $13.4 million receivable for distributions approved and recorded in December 2016.

(3)
See Note 2, Disposition, for more information on this transaction.