Revenue Recognition - Net Sales Disaggregated by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Total net sales	$ 1,619.4	$ 1,649.5	$ 4,650.0	$ 5,036.8
Commercial Print
Disaggregation Of Revenue [Line Items]
Total net sales	442.9	496.4	1,278.8	1,421.3
Direct Marketing
Disaggregation Of Revenue [Line Items]
Total net sales	193.5	142.7	479.0	424.1
Packaging
Disaggregation Of Revenue [Line Items]
Total net sales	182.1	179.7	484.2	474.0
Statements
Disaggregation Of Revenue [Line Items]
Total net sales	134.0	133.5	417.1	436.4
Labels
Disaggregation Of Revenue [Line Items]
Total net sales	124.0	118.8	364.1	355.5
Digital Print and Fulfillment
Disaggregation Of Revenue [Line Items]
Total net sales	122.5	113.5	347.2	332.6
Supply Chain Management
Disaggregation Of Revenue [Line Items]
Total net sales	69.8	81.5	222.4	242.2
Forms
Disaggregation Of Revenue [Line Items]
Total net sales	60.0	63.7	181.6	195.5
Products
Disaggregation Of Revenue [Line Items]
Total net sales	1,328.8	1,329.8	3,774.4	3,881.6
Logistics
Disaggregation Of Revenue [Line Items]
Total net sales	204.6	229.1	614.3	880.3
Business Process Outsourcing
Disaggregation Of Revenue [Line Items]
Total net sales	58.6	60.5	181.0	183.1
Digital and Creative Solutions
Disaggregation Of Revenue [Line Items]
Total net sales	27.4	30.1	80.3	91.8
Services
Disaggregation Of Revenue [Line Items]
Total net sales	$ 290.6	$ 319.7	$ 875.6	$ 1,155.2