SUPPLEMENTAL CASH FLOW INFORMATION (Tables)

6 Months Ended

Jun. 30, 2016

Cash and Cash Equivalents [Abstract]

Schedule of supplemental cash flow information

	Six Months Ended June 30
(in millions)	2016			2015
Cash (paid) for interest, net of amount capitalized	$	(27.2	)	$	(29.0	)
Cash received (paid) for income taxes, net of (payments) refunds	43.0			(1.6		)
Significant noncash transactions:
Accounts payable related to construction costs	37.0			45.0