Postemployment Benefits Change in Benefit Obligation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Health and Welfare [Member]
Benefit Plan, Change In Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 6.4		$ 5.2
Service cost	0.1		0.1		0.1
Interest cost	0.2		0.3		0.3
Actuarial (gain) loss	0.1	[1]	1.6	[1]	0.8	[1]
Foreign currency (gain) loss	0		0		0
Benefits paid, net of retiree contributions	(0.3)		(0.8)
Benefit obligation at end of year	6.5		6.4		5.2
Funded status	(6.5)		(6.4)
Postemployment Benefits [Member]
Benefit Plan, Change In Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	10.0		10.4
Service cost	0.9		0.9		1.3
Interest cost	0.8		0.9		1.4
Actuarial (gain) loss	3.1	[1]	0.8	[1]	(7.6)	[1]
Foreign currency (gain) loss	0.6		(1.4)		0.9
Benefits paid, net of retiree contributions	(2.2)		(1.6)
Benefit obligation at end of year	13.2		10.0		10.4
Funded status	$ (13.2)		$ (10.0)

[1] Net benefit costs above do not include a component for the amortization of actuarial gains or losses as the Company’s policy is to recognize such gains and losses immediately.