Restructuring, Impairment and Other Charges - Schedule of Net Restructuring, Impairment and Other Charges (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Restructuring Cost And Reserve [Line Items]
Employee Terminations	$ 11.2	$ 18.8	$ 24.9	$ 39.8
Other Restructuring Charges	2.3	4.6	8.7	13.0
Total Restructuring Charges	13.5	23.4	33.6	52.8
Impairment		28.2	0.5	29.0
Other Charges	1.5	1.3	4.3	23.1
Total	15.0	52.9	38.4	104.9
Total Operating Segments | Publishing and Retail Services
Restructuring Cost And Reserve [Line Items]
Employee Terminations		2.1	2.1	5.3
Other Restructuring Charges	1.2	1.0	2.8	2.5
Total Restructuring Charges	1.2	3.1	4.9	7.8
Impairment		2.0	1.1	1.5
Other Charges	0.8	0.7	2.4	18.5
Total	2.0	5.8	8.4	27.8
Total Operating Segments | Variable Print
Restructuring Cost And Reserve [Line Items]
Employee Terminations	1.2	0.5	1.5	3.6
Other Restructuring Charges	0.3	2.1	1.8	5.4
Total Restructuring Charges	1.5	2.6	3.3	9.0
Impairment		(0.1)	0.1	1.6
Other Charges	0.6	0.4	1.5	1.3
Total	2.1	2.9	4.9	11.9
Total Operating Segments | Strategic Services
Restructuring Cost And Reserve [Line Items]
Employee Terminations	2.6	1.9	4.1	5.7
Other Restructuring Charges	0.4	0.5	1.1	1.6
Total Restructuring Charges	3.0	2.4	5.2	7.3
Impairment		0.9	0.6	0.9
Other Charges	0.1	0.2	0.4	3.3
Total	3.1	3.5	6.2	11.5
Total Operating Segments | International
Restructuring Cost And Reserve [Line Items]
Employee Terminations	0.9	13.1	7.0	22.3
Other Restructuring Charges	0.3	0.8	2.9	2.5
Total Restructuring Charges	1.2	13.9	9.9	24.8
Impairment		25.4	(2.5)	25.0
Total	1.2	39.3	7.4	49.8
Corporate
Restructuring Cost And Reserve [Line Items]
Employee Terminations	6.5	1.2	10.2	2.9
Other Restructuring Charges	0.1	0.2	0.1	1.0
Total Restructuring Charges	6.6	1.4	10.3	3.9
Impairment			1.2
Total	$ 6.6	$ 1.4	$ 11.5	$ 3.9