Revenue Recognition - Net Sales Disaggregated by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation Of Revenue [Line Items]
Total net sales	$ 1,162.2	$ 1,508.7	$ 2,571.7	$ 3,030.6
Commercial Print
Disaggregation Of Revenue [Line Items]
Total net sales	275.5	413.5	638.9	835.9
Direct Marketing
Disaggregation Of Revenue [Line Items]
Total net sales	108.0	137.0	290.8	285.5
Statements
Disaggregation Of Revenue [Line Items]
Total net sales	101.9	133.6	228.8	283.1
Labels
Disaggregation Of Revenue [Line Items]
Total net sales	113.7	119.6	235.3	240.1
Packaging
Disaggregation Of Revenue [Line Items]
Total net sales	150.4	162.6	265.5	302.1
Digital Print and Fulfillment
Disaggregation Of Revenue [Line Items]
Total net sales	84.6	115.1	198.2	224.7
Supply Chain Management
Disaggregation Of Revenue [Line Items]
Total net sales	64.9	74.1	134.6	152.6
Forms
Disaggregation Of Revenue [Line Items]
Total net sales	48.6	59.2	101.0	121.6
Products
Disaggregation Of Revenue [Line Items]
Total net sales	947.6	1,214.7	2,093.1	2,445.6
Logistics
Disaggregation Of Revenue [Line Items]
Total net sales	155.2	208.0	350.4	409.7
Business Process Outsourcing
Disaggregation Of Revenue [Line Items]
Total net sales	38.0	60.6	79.4	122.4
Digital and Creative Solutions
Disaggregation Of Revenue [Line Items]
Total net sales	21.4	25.4	48.8	52.9
Services
Disaggregation Of Revenue [Line Items]
Total net sales	$ 214.6	$ 294.0	$ 478.6	$ 585.0