Employee Benefit Plans - Defined Benefit Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of net periodic benefit costs:
Service cost	$ 7.2	$ 4.8	$ 5.5
Interest cost	2.5	4.6	4.1
Expected return on plan assets	(2.3)	(4.1)	(3.8)
Settlement loss recognized	10.2
Amortization of net loss	4.1	0.1	2.2
Net periodic benefit costs	21.7	5.4	8.0
Change in benefit obligation:
Benefit obligation at beginning of year	207.2	183.1
Service cost	7.2	4.8	5.5
Interest cost	2.5	4.6	4.1
Plan participant contributions	3.9	3.8
Plan curtailments	(0.3)	(0.6)
Benefits paid	1.3	(7.1)
Actuarial loss (gain)	7.5	42.1
Plan amendments	14.7
Plan settlements	(39.7)
Premiums paid	(1.4)
Plan combinations	0.9
Impact of foreign currency exchange rates	(4.6)	(23.5)
Benefit obligation at end of year	199.2	207.2	183.1
Change in plan assets:
Fair value of plan assets at beginning of year	139.6	141.0
Return on plan assets	(3.7)	12.0
Plan participant and employer contributions	9.5	9.5
Benefits paid	1.3	(7.1)
Plan settlements	(39.7)
Premiums paid	(1.4)
Plan combinations	0.1
Impact of foreign currency exchange rates	0.4	(15.8)
Fair value of plan assets at end of year	106.1	139.6	$ 141.0
Net funded status	(93.1)	(67.6)
Accumulated benefit obligation	189.7	198.4
Amounts recognized in the accompanying consolidated balance sheets:
Current liabilities	(1.5)	(1.4)
Non-current liabilities	(91.6)	(66.2)
Net amount recognized	(93.1)	(67.6)
Pre-tax amounts recognized in accumulated other comprehensive income:
Prior service cost	(12.2)
Net actuarial loss	(48.5)	(48.8)
Accumulated other comprehensive loss	(60.7)	(48.8)
Accumulated contributions in excess of net periodic benefit cost	(32.4)	(18.8)
Net amount recognized	(93.1)	$ (67.6)
Accumulated other comprehensive income expected to be recognized as amortization of net loss within net periodic benefit cost in 2016	$ 4.1