Retirement and Other Postretirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
U.S. Non-qualified Defined Benefit Retirement Plans
Net periodic benefit costs of defined benefit retirement plans
Service cost	$ 0.2	$ 0.7	$ 0.5	$ 1.4
Interest cost	0.2	0.2	0.4	0.4
Net amortization and deferral	1.0	0.6	1.9	1.3
Settlement expense	1.4		2.7
Net periodic (credit) benefit cost	2.8	1.5	5.5	3.1
Amounts recognized on the balance sheet:
Accrued liabilities	25.9		25.9		23.8
Other non-current liabilities	20.4		20.4		18.1
Total accrued benefit	46.3		46.3		41.9
Expected employer contribution in next fiscal year			25.9
Employer contribution to defined benefit retirement plans					0.3
European Defined Benefit Retirement Plans
Net periodic benefit costs of defined benefit retirement plans
Service cost	0.2	0.1	0.4	0.3
Interest cost	1.8	1.8	3.6	3.5
Expected return on plan assets	(2.4)	(2.1)	(4.8)	(4.1)
Net amortization and deferral	0.2	0.3	0.3	0.6
Net periodic (credit) benefit cost	(0.2)	0.1	(0.5)	0.3
Amounts recognized on the balance sheet:
Noncurrent asset	7.8		7.8		2.7
Accrued liabilities	1.9		1.9		0.4
Other non-current liabilities	17.3		17.3		15.7
Total accrued benefit	19.2		19.2		16.1
Expected employer contribution in next fiscal year			3.8
Employer contribution to defined benefit retirement plans	1.7	1.3	3.1	2.7	5.9
Postretirement Health Care and Life Insurance Benefit Plans
Amounts recognized on the balance sheet:
Accrued liabilities	0.6		0.6		0.6
Other non-current liabilities	5.6		5.6		5.8
Total accrued benefit	6.2		6.2		6.4
Expected employer contribution in next fiscal year			0.3
Employer contribution to defined benefit retirement plans	$ 0.1	$ 0.1	$ 0.2	$ 0.2	$ 0.3