Restructuring, Impairment and Other Charges - Schedule of Changes in the Restructuring Reserve (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019 USD ($)
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	$ 1.7
Restructuring Charges	8.3
Reversals	(0.1)
Cash Paid	(5.4)
Balance at the end	3.4
ASU 2016-02
Restructuring Cost And Reserve [Line Items]
Adoption of ASU 2016-02	(1.1)
Employee terminations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	0.4
Restructuring Charges	8.3
Reversals	(0.1)
Cash Paid	(5.3)
Balance at the end	3.3
Employee terminations | ASU 2016-02
Restructuring Cost And Reserve [Line Items]
Adoption of ASU 2016-02	0.0
Lease terminations
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	1.1
Restructuring Charges	0.0
Reversals	0.0
Cash Paid	0.0
Balance at the end	0.0
Lease terminations | ASU 2016-02
Restructuring Cost And Reserve [Line Items]
Adoption of ASU 2016-02	(1.1)
Other
Restructuring Cost And Reserve [Line Items]
Balance at the beginning	0.2
Restructuring Charges	0.0
Reversals	0.0
Cash Paid	(0.1)
Balance at the end	0.1
Other | ASU 2016-02
Restructuring Cost And Reserve [Line Items]
Adoption of ASU 2016-02	$ 0.0