Goodwill and Other Intangible Assets - Schedule of Changes in the Carrying Value of Goodwill by Segment (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill gross	$ 4,784.3	$ 4,784.3	$ 4,803.5
Accumulated impairment losses	(3,046.5)	(3,046.5)	(3,096.9)
Goodwill	1,737.8	1,737.8	1,706.6
Acquisitions		58.3
Foreign exchange and other adjustments		(9.1)
Impairment charges		(18.0)
Publishing and Retail Services
Goodwill [Line Items]
Goodwill gross	739.2	739.2	688.0
Accumulated impairment losses	(688.0)	(688.0)	(688.0)
Goodwill	51.2	51.2
Acquisitions		51.2
Variable Print
Goodwill [Line Items]
Goodwill gross	1,912.0	1,912.0	1,914.1
Accumulated impairment losses	(1,105.2)	(1,105.2)	(1,105.2)
Goodwill	806.8	806.8	808.9
Foreign exchange and other adjustments		(2.1)
Strategic Services
Goodwill [Line Items]
Goodwill gross	986.4	986.4	987.5
Accumulated impairment losses	(220.1)	(220.1)	(222.4)
Goodwill	766.3	766.3	765.1
Acquisitions		1.8
Foreign exchange and other adjustments		(0.6)
International
Goodwill [Line Items]
Goodwill gross	1,146.7	1,146.7	1,213.9
Accumulated impairment losses	(1,033.2)	(1,033.2)	(1,081.3)
Goodwill	113.5	113.5	$ 132.6
Acquisitions		5.3
Foreign exchange and other adjustments		(6.4)
Impairment charges	$ (18.0)	$ (18.0)