Goodwill and Other Intangible Assets and Long-Lived Assets (Schedule Of Total Intangible Assets Primarily Acquired Through Business Combinations) (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016	Aug. 01, 2016
Gross Carrying Value	$ 551.3	$ 541.8	$ 22.7
Accumulated Amortization	(258.1)	(234.2)
Intangible assets, net	293.2	307.6
Software [Member]
Gross Carrying Value	41.3	41.3
Accumulated Amortization	(41.3)	(41.3)
Intangible assets, net	0.0	0.0
Trademarks [Member]
Gross Carrying Value	26.9	26.5
Accumulated Amortization	(25.3)	(21.5)
Intangible assets, net	1.6	5.0
Customer Relationships [Member]
Gross Carrying Value	483.1	474.0
Accumulated Amortization	(191.5)	(171.4)
Intangible assets, net	$ 291.6	$ 302.6