Segment Information (Schedule Of Net Sales And Assets By Geographic Region) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 770.5	$ 833.5	$ 796.4	$ 779.6	$ 683.6	$ 686.5	$ 644.3	$ 746.9	$ 3,180.0	$ 2,761.3	$ 3,074.5
Long-lived assets	623.7				677.4				623.7	677.4
United States
Segment Reporting Information [Line Items]
Net sales									1,645.4	1,423.2	1,557.0
Long-lived assets	295.8				311.9				295.8	311.9
Canada
Segment Reporting Information [Line Items]
Net sales									286.9	217.1	243.1
Long-lived assets	18.2				15.8				18.2	15.8
United Kingdom
Segment Reporting Information [Line Items]
Net sales									140.9	122.8	168.6
Continental Europe
Segment Reporting Information [Line Items]
Net sales									406.0	362.7	465.4
Long-lived assets	231.3				266.6				231.3	266.6
Other international
Segment Reporting Information [Line Items]
Net sales									700.8	635.5	$ 640.4
Long-lived assets	62.8				60.7				62.8	60.7
Corporate Segment
Segment Reporting Information [Line Items]
Long-lived assets	$ 15.6				$ 22.4				$ 15.6	$ 22.4