CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net Income	$ 65.7	$ 40.4	$ 166.7	$ 118.1
Other comprehensive income (loss):
Reclassification adjustment transferred to Net income from cash flow hedges	0.6	0.6	1.2	1.2
Pension and other postretirement benefit costs	1.1	(2.2)	1.7	(4.3)
Total Comprehensive Income	$ 67.4	$ 38.8	$ 169.6	$ 115.0