Segment Information (Assets by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Net pension income	$ (12.6)	$ (14.5)
Assets	1,701.8	1,890.0
Operating Segments
Segment Reporting Information [Line Items]
Assets	1,679.7	1,712.4
Corporate
Segment Reporting Information [Line Items]
Assets	22.1	177.6
United States Print and Related Services
Segment Reporting Information [Line Items]
Assets	1,390.2	1,459.7
International
Segment Reporting Information [Line Items]
Assets	$ 289.5	$ 252.7