Employee Benefit Plans - Changes in Projected Benefit Obligations and Plan Assets (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)
Changes in projected benefit obligations:
Projected benefit obligations assumed in business combination	$ 49.8
Service cost	0.9
Interest cost	0.7
Actuarial gain	(7.2)
Benefits paid	(0.8)
Currency translation and other	(1.2)
Projected benefit obligations at end of period	42.2
Changes in plan assets:
Fair value of plan assets acquired in business combination	3.8
Employer contributions	0.5
Actual return on plan assets	0.1
Currency translation and other	(0.2)
Fair value of plan assets at end of period	4.2
Net amount recognized	$ 38.0