Restructuring, Impairment and Other Charges - Schedule of Net Restructuring, Impairment and Other Charges (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost And Reserve [Line Items]
Employee Terminations	$ 6.4	$ 4.9
Other Restructuring Charges	1.6	1.5
Total Restructuring Charges	8.0	6.4
Impairment	0.5	(1.6)
Other Charges	0.6	0.5
Total	9.1	5.3
Strategic Services
Restructuring Cost And Reserve [Line Items]
Impairment	0.5
Total Operating Segments | Variable Print
Restructuring Cost And Reserve [Line Items]
Employee Terminations	0.4	0.2
Other Restructuring Charges	0.1	0.8
Total Restructuring Charges	0.5	1.0
Impairment		(0.1)
Other Charges	0.5	0.4
Total	1.0	1.3
Total Operating Segments | Strategic Services
Restructuring Cost And Reserve [Line Items]
Employee Terminations	1.0	0.3
Other Restructuring Charges	0.4
Total Restructuring Charges	1.4	0.3
Impairment	0.5
Other Charges	0.1	0.1
Total	2.0	0.4
Total Operating Segments | International
Restructuring Cost And Reserve [Line Items]
Employee Terminations	3.5	4.2
Other Restructuring Charges	1.0	0.5
Total Restructuring Charges	4.5	4.7
Impairment		(2.8)
Total	4.5	1.9
Corporate
Restructuring Cost And Reserve [Line Items]
Employee Terminations	1.5	0.2
Other Restructuring Charges	0.1	0.2
Total Restructuring Charges	1.6	0.4
Impairment		1.3
Total	$ 1.6	$ 1.7