Pension and Postretirement Benefit Obligation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period End)	$ 527.0	$ 508.1
Domestic Pension Plan
Benefit Obligation [Roll Forward]
Benefit Obligation (Period Start)	133.1	140.6
Service cost	0	0	0
Interest cost	6.2	5.5	6.3
Benefits paid	(10.4)	(10.4)
Plan participant contributions	0	0
Actuarial losses (gains)	18.0	(2.6)
Settlements and curtailments	0	0
Foreign currency effect	0	0
Other	0	0
Benefit Obligation (Period End)	146.9	133.1	140.6
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	109.6	115.7
Actual return on plan assets	9.6	3.8
Employer contributions	2.7	0.5
Plan participant contributions	0	0
Benefits paid	(10.4)	(10.4)
Settlements	0	0
Foreign currency effect	0	0
Fair Value of Plan Assets (Period End)	111.5	109.6	115.7
Defined Benefit Plan, Funded Status of Plan	(35.4)	(23.5)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	0	0
Current liability	0	0
Non-current liability	(35.4)	(23.5)
Net liability recognized	(35.4)	(23.5)
Accumulated benefit obligation	146.9	133.1
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss (gain)	56.1	47.0
Prior service cost (credit)	0	0
Transition obligation	0	0
Total amount recognized	56.1	47.0
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	8.2
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	146.9	133.1
Aggregate accumulated benefit obligation	146.9	133.1
Aggregate fair value of plan assets	111.5	109.6
Foreign Pension Plans
Benefit Obligation [Roll Forward]
Benefit Obligation (Period Start)	569.9	532.4
Service cost	10.3	9.9	10.2
Interest cost	23.4	21.7	21.9
Benefits paid	(24.1)	(23.8)
Plan participant contributions	0.6	0.5
Actuarial losses (gains)	55.7	25.0
Settlements and curtailments	(4.0)	(3.1)
Foreign currency effect	(42.8)	8.1
Other	0.5	(0.8)
Benefit Obligation (Period End)	589.5	569.9	532.4
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	398.5	381.7
Actual return on plan assets	44.7	19.5
Employer contributions	25.7	18.3
Plan participant contributions	0.6	0.5
Benefits paid	(24.1)	(23.8)
Settlements	(4.0)	(2.7)
Foreign currency effect	(25.9)	5.0
Fair Value of Plan Assets (Period End)	415.5	398.5	381.7
Defined Benefit Plan, Funded Status of Plan	(174.0)	(171.4)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	8.3	8.0
Current liability	(8.0)	(7.6)
Non-current liability	(174.3)	(171.8)
Net liability recognized	(174.0)	(171.4)
Accumulated benefit obligation	566.2	540.9
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss (gain)	161.0	141.0
Prior service cost (credit)	1.1	1.5
Transition obligation	0	0
Total amount recognized	162.1	142.5
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year	4.6
Pension plans with underfunded or unfunded accumulated benefit obligation
Aggregate projected benefit obligation	577.1	553.2
Aggregate accumulated benefit obligation	559.5	528.7
Aggregate fair value of plan assets	395.8	374.7
Domestic Postretirement Benefit Plan
Benefit Obligation [Roll Forward]
Benefit Obligation (Period Start)	37.9	46.6
Service cost	0.1	0.1	0.2
Interest cost	1.7	1.6	2.3
Benefits paid	(5.6)	(6.4)
Plan participant contributions	1.5	1.7
Actuarial losses (gains)	4.4	(5.7)
Settlements and curtailments	0	0
Foreign currency effect	0	0
Other	(0.5)	0
Benefit Obligation (Period End)	39.5	37.9	46.6
Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets (Period Start)	0	0
Actual return on plan assets	0	0
Employer contributions	4.1	4.7
Plan participant contributions	1.5	1.7
Benefits paid	(5.6)	(6.4)
Settlements	0	0
Foreign currency effect	0	0
Fair Value of Plan Assets (Period End)	0	0	0
Defined Benefit Plan, Funded Status of Plan	(39.5)	(37.9)
Amounts Recognized in Consolidated Balance Sheets
Non-current asset	0	0
Current liability	(4.0)	(4.2)
Non-current liability	(35.5)	(33.7)
Net liability recognized	(39.5)	(37.9)
Amounts recognized in Accumulated Other Comprehensive Loss, net
Net actuarial loss (gain)	2.9	(1.5)
Prior service cost (credit)	(0.4)	(0.1)
Transition obligation	0	0
Total amount recognized	$ 2.5	$ (1.6)