Supplemental Cash Flow Information

12 Months Ended

Dec. 31, 2015

Supplemental Cash Flow Information [Abstract]

Cash Flow, Supplemental Disclosures [Text Block]

Supplemental Cash Flow Information

The following table discloses information about investing and financing activities that affected recognized assets and liabilities but which did not result in cash receipts or payments.  Also disclosed in the table iscash paid for interest, net of interest capitalized, and cash paid for income taxes, net of income tax refunds.

Year ended December 31 (In millions)	2015			2014		2013
NON-CASH INVESTING AND FINANCING ACTIVITIES
Power plant long-term service agreement	$	2.3		$	—	$	9.7
Investment in Enable (Note 3)	—			—		1,248.6
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid during the period for
Interest (net of interest capitalized) (A)	$	145.4		$	150.8	$	151.1
Income taxes (net of income tax refunds)	(3.4		)	0.2		(1.1		)

(A) Net of interest capitalized of$4.2 million, $2.4 millionand$5.4 millionin2015, 2014and2013, respectively.