Employee Benefits Schedule of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost		$ 0.2	$ 0.6
Interest cost		1.2	1.3
Expected return on plan assets		(1.4)	(1.4)
Amortization of prior service costs	[1]	0.1	0.8
Amortization of actuarial losses	[1]	0.2	0.3
Periodic expense		0.3	1.6
Other Postretirement Benefit Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost		0.1	0.1
Periodic expense		$ 0.1	$ 0.1

[1] Amortization of prior service costs and actuarial losses out of accumulated other comprehensive income are recognized in the Condensed Consolidated Statements of Operations in "General and administrative"