CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 38.3	$ 28.4	$ 156.4	$ 109.9
Other comprehensive income (loss):
Gain (loss) on cash flow hedges	0.0	0.2	0.0	(0.7)
Reclassification adjustment transferred to Net Income from cash flow hedges	0.6	0.5	1.8	2.1
Pension and other postretirement benefit costs	0.0	(2.0)	(4.3)	(5.9)
Total Comprehensive Income	38.9	27.1	153.9	105.4
Comprehensive loss attributable to noncontrolling interests	0.0	(0.8)	0.0	(86.9)
Comprehensive income attributable to controlling interests	$ 38.9	$ 27.9	$ 153.9	$ 192.3