Revenue Recognition - Net Sales Disaggregated by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation Of Revenue [Line Items]
Total net sales	$ 1,649.5	$ 1,734.9	$ 5,036.8	$ 5,013.8
Commercial Print
Disaggregation Of Revenue [Line Items]
Total net sales	496.4	510.5	1,421.3	1,495.9
Statements
Disaggregation Of Revenue [Line Items]
Total net sales	133.5	142.1	436.4	439.8
Direct Mail
Disaggregation Of Revenue [Line Items]
Total net sales	142.7	139.5	424.1	392.0
Labels
Disaggregation Of Revenue [Line Items]
Total net sales	118.8	118.3	355.5	343.5
Packaging
Disaggregation Of Revenue [Line Items]
Total net sales	179.7	150.9	474.0	377.5
Digital Print and Fulfillment
Disaggregation Of Revenue [Line Items]
Total net sales	113.5	115.2	332.6	342.7
Supply Chain Management
Disaggregation Of Revenue [Line Items]
Total net sales	81.5	76.8	242.2	226.1
Forms
Disaggregation Of Revenue [Line Items]
Total net sales	63.7	68.7	195.5	213.4
Products
Disaggregation Of Revenue [Line Items]
Total net sales	1,329.8	1,322.0	3,881.6	3,830.9
Logistics
Disaggregation Of Revenue [Line Items]
Total net sales	229.1	314.2	880.3	904.4
Business Process Outsourcing
Disaggregation Of Revenue [Line Items]
Total net sales	60.5	59.1	183.1	165.1
Digital and Creative Solutions
Disaggregation Of Revenue [Line Items]
Total net sales	29.4	37.7	88.4	108.2
Direct Mail
Disaggregation Of Revenue [Line Items]
Total net sales	0.7	1.9	3.4	5.2
Services
Disaggregation Of Revenue [Line Items]
Total net sales	$ 319.7	$ 412.9	$ 1,155.2	$ 1,182.9