Employee Benefit Plans (Plans' Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Changes in plan assets:
Fair value of plan assets at beginning of year	$ 315.0
Fair value of plan assets at end of year	293.0	$ 315.0
Pension Benefits [Member]
Pension and Postretirement Benefit Plans recognized in financial statements
Accumulated benefit obligation	409.2	439.6
Changes in projected benefit obligation:
Benefit obligation at beginning of year	446.5	374.6
Service cost	4.8	4.2	$ 5.2
Interest cost	17.2	17.7	16.2
Plan participants' contributions	0.0	0.0
Amendments	0.1	0.0
Other	0.0	0.0
Actuarial (gain) loss	(29.6)	77.0
Effect of exchange rates	(5.2)	(4.3)
Divestiture	0.0	0.0
Settlements and curtailments	(0.8)	(0.8)
Benefits paid	(17.6)	(21.9)
Benefit obligation at end of year	415.4	446.5	374.6
Changes in plan assets:
Fair value of plan assets at beginning of year	315.0	302.8
Actual gain return on plan assets	(3.2)	23.3
Employer contribution	3.8	14.5
Plan participants' contributions	0.0	0.0
Effect of exchange rates	(4.2)	(2.9)
Divestiture	0.0	0.0
Plan settlements	(0.8)	(0.8)
Benefits paid	(17.6)	(21.9)
Fair value of plan assets at end of year	293.0	315.0	302.8
Funded status / net amount recognized	(122.4)	(131.5)
Net amount recognized consists of:
Current liability	(1.6)	(1.6)
Non-current liability	(120.8)	(129.9)
Net amount recognized	(122.4)	(131.5)
Other Benefits [Member]
Changes in projected benefit obligation:
Benefit obligation at beginning of year	5.4	6.0
Service cost	0.0	0.0	0.0
Interest cost	0.2	0.2	0.2
Plan participants' contributions	0.5	0.6
Amendments	0.0	0.0
Other	0.0	0.0
Actuarial (gain) loss	0.1	0.6
Effect of exchange rates	0.0	0.0
Divestiture	0.0	0.0
Settlements and curtailments	0.0	0.0
Benefits paid	(1.3)	(2.0)
Benefit obligation at end of year	4.9	5.4	6.0
Changes in plan assets:
Fair value of plan assets at beginning of year	0.0	0.0
Actual gain return on plan assets	0.0	0.0
Employer contribution	0.8	1.4
Plan participants' contributions	0.5	0.6
Effect of exchange rates	0.0	0.0
Divestiture	0.0	0.0
Plan settlements	0.0	0.0
Benefits paid	(1.3)	(2.0)
Fair value of plan assets at end of year	0.0	0.0	$ 0.0
Funded status / net amount recognized	(4.9)	(5.4)
Net amount recognized consists of:
Current liability	(0.8)	(0.9)
Non-current liability	(4.1)	(4.5)
Net amount recognized	$ (4.9)	$ (5.4)