Cost Reduction Plans - Summary of the CIP Reserve Activity (Details) $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 8.9
Accrual	33.9
Payments	(1.4)
Ending balance	41.4
Severance
Restructuring Cost and Reserve [Line Items]
Beginning balance	6.8
Accrual	33.3
Payments	(1.2)
Ending balance	38.9
Retention
Restructuring Cost and Reserve [Line Items]
Beginning balance	2.1
Accrual	0.6
Payments	(0.2)
Ending balance	$ 2.5