Pension and Other Post-Retirement Benefit Plans (Associated Balances Recognized Consolidated Financial Statements) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Company contributions	$ 33.6	$ 59.6
Amounts recognized in balance sheet
Accrued pension and other post-retirement benefits, net of current portion	(236.7)	(84.0)
U.S.
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Accumulated benefit obligation	552.4	513.3
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at January 1	585.0	692.9
Service cost	13.8	16.5	14.6
Interest cost	29.1	25.8	26.9
Actuarial (gain) loss	101.8	(119.8)
Amendments	2.4
Settlements	(63.8)	(11.1)
Benefits paid	(27.7)	(19.3)
Projected benefit obligation at December 31	640.6	585.0	692.9
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at January 1	576.8	462.5
Actual return on plan assets	8.5	115.2
Company contributions	11.0	29.5
Settlements	(63.8)	(11.1)
Benefits paid	(27.7)	(19.3)
Fair value of plan assets at December 31	504.8	576.8	462.5
Funded status of the plans (liability) at December 31	(135.8)	(8.2)
Amounts recognized in balance sheet
Other assets		38.3
Current portion of accrued pension and other post-retirement benefits	(4.1)	(9.1)
Accrued pension and other post-retirement benefits, net of current portion	(131.7)	(37.4)
Funded status of the plans (liability) at December 31	(135.8)	(8.2)
Pre-tax amounts recognized in accumulated other comprehensive (income) loss:
Unrecognized actuarial (gain) loss	234.9	130.1
Unrecognized prior service (credit) cost	0.2	0.1
Accumulated other comprehensive (income) loss at December 31	235.1	130.2
Plans with underfunded or non-funded projected benefit obligation:
Aggregate projected benefit obligation	640.6	46.4
Aggregate fair value of plan assets	504.8
Plans with underfunded or non-funded accumulated benefit obligation:
Aggregate accumulated benefit obligation	552.4	36.2
Aggregate fair value of plan assets	504.8
International
Pension and Other Postretirement Benefit Plans Disclosure [Line Items]
Accumulated benefit obligation	406.3	360.1
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at January 1	438.8	372.3
Service cost	16.7	14.7	37.2
Interest cost	18.5	16.1	21.4
Actuarial (gain) loss	71.6	45.6
Amendments	0.3	0.6
Foreign currency exchange rate changes	(53.6)	(2.5)
Plan participants’ contributions	2.4	2.2
Benefits paid	(12.2)	(10.2)
Projected benefit obligation at December 31	482.5	438.8	372.3
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at January 1	400.8	327.9
Actual return on plan assets	13.5	52.2
Company contributions	22.6	30.1
Foreign currency exchange rate changes	(40.4)	(1.4)
Plan participants’ contributions	2.4	2.2
Benefits paid	(12.2)	(10.2)
Fair value of plan assets at December 31	386.7	400.8	327.9
Funded status of the plans (liability) at December 31	(95.8)	(38.0)
Amounts recognized in balance sheet
Other assets		3.8
Current portion of accrued pension and other post-retirement benefits	(0.4)	(1.3)
Accrued pension and other post-retirement benefits, net of current portion	(95.4)	(40.5)
Funded status of the plans (liability) at December 31	(95.8)	(38.0)
Pre-tax amounts recognized in accumulated other comprehensive (income) loss:
Unrecognized actuarial (gain) loss	187.8	113.6
Unrecognized prior service (credit) cost	1.3	1.5
Unrecognized transition asset	(0.2)	(0.4)
Accumulated other comprehensive (income) loss at December 31	188.9	114.7
Plans with underfunded or non-funded projected benefit obligation:
Aggregate projected benefit obligation	482.5	151.8
Aggregate fair value of plan assets	386.7	110.1
Plans with underfunded or non-funded accumulated benefit obligation:
Aggregate accumulated benefit obligation	145.0	28.9
Aggregate fair value of plan assets	103.1	9.0
Other Post-retirement Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation at January 1	6.7	8.7
Service cost	0.1	0.1	0.1
Interest cost	0.3	0.2	0.4
Actuarial (gain) loss	4.0	(1.7)
Amendments	(0.1)
Benefits paid	(0.6)	(0.6)
Projected benefit obligation at December 31	10.4	6.7	8.7
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Company contributions	0.6	0.6
Benefits paid	(0.6)	(0.6)
Funded status of the plans (liability) at December 31	(10.4)	(6.7)
Amounts recognized in balance sheet
Current portion of accrued pension and other post-retirement benefits	(0.8)	(0.6)
Accrued pension and other post-retirement benefits, net of current portion	(9.6)	(6.1)
Funded status of the plans (liability) at December 31	(10.4)	(6.7)
Pre-tax amounts recognized in accumulated other comprehensive (income) loss:
Unrecognized actuarial (gain) loss	1.1	(3.2)
Unrecognized prior service (credit) cost	(0.1)
Accumulated other comprehensive (income) loss at December 31	1.0	(3.2)
Plans with underfunded or non-funded projected benefit obligation:
Aggregate projected benefit obligation	$ 10.4	$ 6.7