Restructuring and Other - Narrative (Detail) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($) Facility	Jun. 30, 2017 USD ($) Facility	Jun. 30, 2018 USD ($) Facility	Jun. 30, 2017 USD ($) Facility
Restructuring Cost And Reserve [Line Items]
Employee termination costs	$ 5.2	$ 2.4	$ 8.4	$ 8.8
Other restructuring charges	$ 3.8	$ 1.1	5.4	$ 2.7
Facility Closures
Restructuring Cost And Reserve [Line Items]
Impairment of other long lived assets			$ 1.7
Business Services
Restructuring Cost And Reserve [Line Items]
Number of facilities closed | Facility	2		2
Gain on sale of previously impaired assets			$ 4.9
Marketing Solutions
Restructuring Cost And Reserve [Line Items]
Number of facilities closed | Facility		1		1
Marketing Solutions | Facility Closures
Restructuring Cost And Reserve [Line Items]
Gain on sale of previously impaired assets		$ 0.3
Impairment of other long lived assets				$ 0.5