Segment Information (Schedule Of Net Sales And Assets By Geographic Region) (Details) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 839.6	$ 855.8	$ 851.0	$ 799.1	$ 714.2		$ 695.9	$ 702.5	$ 673.4	$ 3,345.5	$ 2,786.0		$ 2,748.0
Assets	4,042.7				3,593.5					4,042.7	3,593.5		3,428.0
Long-Lived Assets	2,157.7				2,109.8					2,157.7	2,109.8		1,993.6
U.S. [Member]
Segment Reporting Information [Line Items]
Revenues										2,107.2	1,767.3	[1]	1,769.7	[1]
Assets	1,866.5				1,645.3	[1]				1,866.5	1,645.3	[1]	1,609.4	[1]
Long-Lived Assets	442.3				645.8	[1]				442.3	645.8	[1]	621.3	[1]
Canada [Member]
Segment Reporting Information [Line Items]
Revenues										172.3	169.0	[1]	163.2	[1]
Assets	206.2				170.0	[1]				206.2	170.0	[1]	159.8	[1]
Long-Lived Assets	156.3				115.8	[1]				156.3	115.8	[1]	109.0	[1]
United Kingdom [Member]
Segment Reporting Information [Line Items]
Revenues										397.5	388.2	[1]	357.6	[1]
Europe [Member]
Segment Reporting Information [Line Items]
Revenues										484.2	268.6	[1]	279.6	[1]
Assets	897.7				702.9	[1]				897.7	702.9	[1]	588.0	[1]
Long-Lived Assets	646.8				436.6	[1]				646.8	436.6	[1]	357.9	[1]
Other International [Member]
Segment Reporting Information [Line Items]
Revenues										184.3	192.9	[1]	177.9	[1]
Assets	808.2				432.9	[1]				808.2	432.9	[1]	457.8	[1]
Long-Lived Assets	648.2				269.2	[1]				648.2	269.2	[1]	292.4	[1]
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Assets	264.1				642.4	[1]				264.1	642.4	[1]	613.0	[1]
Long-Lived Assets	$ 264.1				$ 642.4	[1]				$ 264.1	$ 642.4	[1]	$ 613.0	[1]

[1] Net sales and assets by geographic region are based on the location of the business unit.