Condensed Consolidated Statements of Comprehensive Income (Phantom) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Adjustment to pension and other benefit plans, tax impact	$ (1.2)	$ (0.9)	$ (2.5)	$ (1.9)
Unrealized gain or loss on investment, tax impact	(0.1)	0.0	(0.3)	0.0
Other Comprehensive Income, Unrealized Gain (loss) on derivatives arising during the period, tax	$ 0.0	$ 0.2	$ 1.0	$ 0.0