Revenue Recognition - Net Sales Disaggregated by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation Of Revenue [Line Items]
Total net sales	$ 1,679.5	$ 1,620.0	$ 3,387.3	$ 3,278.9
Commercial Print
Disaggregation Of Revenue [Line Items]
Total net sales	462.7	486.2	924.9	985.4
Statements
Disaggregation Of Revenue [Line Items]
Total net sales	143.1	140.0	302.9	297.7
Direct Mail
Disaggregation Of Revenue [Line Items]
Total net sales	133.3	120.1	281.4	252.5
Labels
Disaggregation Of Revenue [Line Items]
Total net sales	119.2	112.1	236.7	225.2
Packaging
Disaggregation Of Revenue [Line Items]
Total net sales	152.9	117.9	294.3	226.6
Digital Print and Fulfillment
Disaggregation Of Revenue [Line Items]
Total net sales	108.3	115.5	219.1	227.5
Supply Chain Management
Disaggregation Of Revenue [Line Items]
Total net sales	80.9	73.8	160.7	149.3
Forms
Disaggregation Of Revenue [Line Items]
Total net sales	64.8	71.8	131.8	144.7
Products
Disaggregation Of Revenue [Line Items]
Total net sales	1,265.2	1,237.4	2,551.8	2,508.9
Logistics
Disaggregation Of Revenue [Line Items]
Total net sales	324.0	294.1	651.2	590.2
Business Process Outsourcing
Disaggregation Of Revenue [Line Items]
Total net sales	61.4	52.8	122.6	106.0
Digital and Creative Solutions
Disaggregation Of Revenue [Line Items]
Total net sales	27.7	34.2	59.0	70.5
Direct Mail
Disaggregation Of Revenue [Line Items]
Total net sales	1.2	1.5	2.7	3.3
Services
Disaggregation Of Revenue [Line Items]
Total net sales	$ 414.3	$ 382.6	$ 835.5	$ 770.0