Employee Benefit Plans (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Changes in plan assets:
Fair value of plan assets at end of year	$ 315.0	$ 302.8
Pension Plans, Defined Benefit [Member]
Pension and Postretirement Benefit Plans recognized in financial statements
Accumulated benefit obligation	439.6	367.3
Changes in projected benefit obligation:
Benefit obligation at beginning of year	374.6	413.9
Service cost	4.2	5.2	5.8
Interest cost	17.7	16.2	17.5
Plan participants' contributions	0	0
Amendments	0	0
Other	0	0.1
Actuarial (gain) loss	77.0	(39.4)
Effect of exchange rates	(4.3)	(0.7)
Divestiture	0	0
Settlements and curtailments	(0.8)	(1.6)
Benefits paid	(21.9)	(19.1)
Benefit obligation at end of year	446.5	374.6	413.9
Changes in plan assets:
Fair value of plan assets at beginning of year	302.8	276.8
Actual gain return on plan assets	23.3	37.4
Employer contribution	14.5	9.9
Plan participants' contributions	0	0
Effect of exchange rates	(2.9)	(0.6)
Divestiture	0	0
Plan settlements	(0.8)	(1.6)
Benefits paid	(21.9)	(19.1)
Fair value of plan assets at end of year	315.0	302.8	276.8
Funded status / net amount recognized	(131.5)	(71.8)
Net amount recognized consists of:
Current liability	(1.6)	(1.8)
Non-current liability	(129.9)	(70.0)
Net amount recognized	(131.5)	(71.8)
Other Postretirement Benefit Plan [Member]
Changes in projected benefit obligation:
Benefit obligation at beginning of year	6.0	7.6
Service cost	0	0	0.2
Interest cost	0.2	0.2	0.4
Plan participants' contributions	0.6	0.7
Amendments	0	0
Other	0	0
Actuarial (gain) loss	0.6	0
Effect of exchange rates	0	0
Divestiture	0	0
Settlements and curtailments	0	0
Benefits paid	(2.0)	(2.5)
Benefit obligation at end of year	5.4	6.0	7.6
Changes in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual gain return on plan assets	0	0
Employer contribution	1.4	1.8
Plan participants' contributions	0.6	0.7
Effect of exchange rates	0	0
Divestiture	0	0
Plan settlements	0	0
Benefits paid	(2.0)	(2.5)
Fair value of plan assets at end of year	0	0	0
Funded status / net amount recognized	(5.4)	(6.0)
Net amount recognized consists of:
Current liability	(0.9)	(1.4)
Non-current liability	(4.5)	(4.6)
Net amount recognized	$ (5.4)	$ (6.0)