Restructuring, Impairment and Transaction-Related Charges (Schedule of Restructuring Reserves) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Loss on the sale of Argentina print business	$ 0.0	$ 23.1
Other restructuring charges	12.0	32.6
Restructuring Reserve [Roll Forward]
Balance, beginning of year	9.6	55.3
Expense, net	77.5	44.8
Cash payments, net	(32.7)	(21.4)
Non-cash adjustments/reclassifications	(22.5)	(69.1)
Balance, end of year	31.9	9.6
Facilities Idled
Restructuring Cost and Reserve [Line Items]
Vacant facility carrying costs and lease exit charges	16.6	5.4
Equipment and Infrastructure Removal Charges
Restructuring Cost and Reserve [Line Items]
Equipment and infrastructure removal costs	0.9	0.7
Sale of facilities
Restructuring Cost and Reserve [Line Items]
Gain on the sale of a facility	(9.2)	0.0
Argentina print business
Restructuring Cost and Reserve [Line Items]
Loss on the sale of Argentina print business	0.0	23.1
Other restructuring charges
Restructuring Cost and Reserve [Line Items]
Other restructuring activities	3.7	3.4
Employee Termination Charges
Restructuring Reserve [Roll Forward]
Balance, beginning of year	2.9	4.7
Expense, net	35.1	7.3
Cash payments, net	(20.4)	(4.1)
Non-cash adjustments/reclassifications	0.0	(5.0)
Balance, end of year	17.6	2.9
Impairment Charges
Restructuring Reserve [Roll Forward]
Balance, beginning of year	0.0	0.0
Expense, net	25.2	2.2
Cash payments, net	0.0	0.0
Non-cash adjustments/reclassifications	(25.2)	(2.2)
Balance, end of year	0.0	0.0
Transaction-Related Charges
Restructuring Reserve [Roll Forward]
Balance, beginning of year	1.5	0.4
Expense, net	4.2	2.0
Cash payments, net	(3.2)	(0.9)
Non-cash adjustments/reclassifications	0.0	0.0
Balance, end of year	2.5	1.5
Integration Costs
Restructuring Reserve [Roll Forward]
Balance, beginning of year	0.0	0.0
Expense, net	1.0	0.7
Cash payments, net	(1.0)	(0.7)
Non-cash adjustments/reclassifications	0.0	0.0
Balance, end of year	0.0	0.0
Other Restructuring Charges
Restructuring Reserve [Roll Forward]
Balance, beginning of year	5.2	50.2
Expense, net	12.0	32.6
Cash payments, net	(8.1)	(15.7)
Non-cash adjustments/reclassifications	2.7	(61.9)
Balance, end of year	$ 11.8	$ 5.2