Supplemental Cash Flow Information Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2015

Supplemental Cash Flow Information [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

	Nine Months Ended September 30
(in millions)	2015		2014
Cash paid for interest, net of amount capitalized	$	151.0	$	143.4
Cash paid for income taxes, net of refunds	2.0		22.0
Significant noncash transactions related to continuing operations:
Accounts payable related to construction costs	179.1		4.9
Amortization of deferred revenue	30.3		41.7