Change in Benefit Obligations and Plan Assets (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in plan assets
Fair value of plan assets at end of year	$ 835.7	$ 764.0
Pension Benefits
Change in benefit obligation
Benefit obligation at beginning of year	828.2	879.5
Service cost	15.1	16.7	16.0
Interest cost	40.9	36.5	36.5
Plan participants’ contributions	0.7	0.7
Amendments	0	0.4
Actuarial loss (gain)	135.1	(69.2)
Currency impact	(6.0)	0.3
Other	(0.6)	(0.5)
Benefits paid	(37.1)	(36.2)
Benefit obligation at end of year	976.3	828.2	879.5
Change in plan assets
Fair value of plan assets at beginning of year	764.0	726.3
Actual return on plan assets	87.1	64.8
Employer contributions	27.6	8.0
Plan participants’ contributions	0.7	0.7
Currency impact	(6.6)	0.4
Benefits paid	(37.1)	(36.2)
Fair value of plan assets at end of year	835.7	764.0	726.3
FUNDED STATUS	(140.6)	(64.2)
Prepaid pensions (included in Other long-term assets)	1.0	18.7
Accrued benefit liability (short-term and long-term)	(141.6)	(82.9)
NET AMOUNT RECOGNIZED IN THE CONSOLIDATED BALANCE SHEET	(140.6)	(64.2)
Amounts recognized in Accumulated other comprehensive loss (income) consist of:
Net actuarial loss	196.4	107.2
Prior service cost (credit)	0.8	1.0
NET AMOUNT RECOGNIZED IN ACCUMULATED OTHER COMPREHENSIVE LOSS	197.2	108.2
Other Benefits
Change in benefit obligation
Benefit obligation at beginning of year	28.1	30.4
Service cost	0.1	0	0
Interest cost	1.1	1.1	1.3
Plan participants’ contributions	0	0
Amendments	0	0
Actuarial loss (gain)	1.6	(1.4)
Currency impact	0	0
Other	(2.2)	(0.1)
Benefits paid	(2.0)	(1.9)
Benefit obligation at end of year	26.7	28.1	30.4
Change in plan assets
Fair value of plan assets at beginning of year	0	0
Plan participants’ contributions	0	0
Benefits paid	(2.0)	(1.9)
Fair value of plan assets at end of year	0	0	0
FUNDED STATUS	(26.7)	(28.1)
Accrued benefit liability (short-term and long-term)	(26.7)	(28.1)
NET AMOUNT RECOGNIZED IN THE CONSOLIDATED BALANCE SHEET	(26.7)	(28.1)
Amounts recognized in Accumulated other comprehensive loss (income) consist of:
Net actuarial loss	0.7	(0.9)
Prior service cost (credit)	(5.2)	(6.2)
NET AMOUNT RECOGNIZED IN ACCUMULATED OTHER COMPREHENSIVE LOSS	$ (4.5)	$ (7.1)