Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 3,923.4	$ 3,985.8	$ 3,951.2
Catalog, publications, retail inserts, books and directories
Disaggregation of Revenue [Line Items]
Net sales	2,315.7	2,452.6	2,543.4
Direct mail and other printed products
Disaggregation of Revenue [Line Items]
Net sales	765.3	704.0	747.9
Other
Disaggregation of Revenue [Line Items]
Net sales	17.3	27.8	57.5
Total Products
Disaggregation of Revenue [Line Items]
Net sales	3,098.3	3,184.4	3,348.8
Logistics services
Disaggregation of Revenue [Line Items]
Net sales	446.4	447.6	418.1
Imaging, marketing services and other services
Disaggregation of Revenue [Line Items]
Net sales	378.7	353.8	184.3
Total Services
Disaggregation of Revenue [Line Items]
Net sales	825.1	801.4	602.4
United States Print and Related Services
Disaggregation of Revenue [Line Items]
Net sales	3,521.0	3,598.7	3,559.9
United States Print and Related Services | Catalog, publications, retail inserts, books and directories
Disaggregation of Revenue [Line Items]
Net sales	2,014.7	2,154.8	2,245.0
United States Print and Related Services | Direct mail and other printed products
Disaggregation of Revenue [Line Items]
Net sales	681.6	633.7	675.1
United States Print and Related Services | Other
Disaggregation of Revenue [Line Items]
Net sales	17.0	27.4	56.6
United States Print and Related Services | Total Products
Disaggregation of Revenue [Line Items]
Net sales	2,713.3	2,815.9	2,976.7
United States Print and Related Services | Logistics services
Disaggregation of Revenue [Line Items]
Net sales	429.4	429.0	398.9
United States Print and Related Services | Imaging, marketing services and other services
Disaggregation of Revenue [Line Items]
Net sales	378.3	353.8	184.3
United States Print and Related Services | Total Services
Disaggregation of Revenue [Line Items]
Net sales	807.7	782.8	583.2
International
Disaggregation of Revenue [Line Items]
Net sales	402.4	387.1	391.3
International | Catalog, publications, retail inserts, books and directories
Disaggregation of Revenue [Line Items]
Net sales	301.0	297.8	298.4
International | Direct mail and other printed products
Disaggregation of Revenue [Line Items]
Net sales	83.7	70.3	72.8
International | Other
Disaggregation of Revenue [Line Items]
Net sales	0.3	0.4	0.9
International | Total Products
Disaggregation of Revenue [Line Items]
Net sales	385.0	368.5	372.1
International | Logistics services
Disaggregation of Revenue [Line Items]
Net sales	17.0	18.6	19.2
International | Imaging, marketing services and other services
Disaggregation of Revenue [Line Items]
Net sales	0.4	0.0	0.0
International | Total Services
Disaggregation of Revenue [Line Items]
Net sales	$ 17.4	$ 18.6	$ 19.2