SUPPLEMENTAL CASH FLOW INFORMATION (Tables)

6 Months Ended

Jun. 30, 2017

Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]

Schedule of supplemental cash flow information

	Six Months Ended June 30
(in millions)	2017		2016
Cash (paid) for interest, net of amount capitalized	(27.5	)	(27.2	)
Cash (paid) received for income taxes, net	(18.5	)	43.0
Significant noncash transactions:
Accounts payable related to construction costs	33.4		37.0
Transfer of ownership in WPSI to another subsidiary of Integrys *	67.2		—
Transfer of net assets to UMERC *	21.1		—

* See Note 11, Related Parties, for more information on these transactions.