Shareholders' Equity (Schedule Of Accumulated Other Comprehensive Income Activity) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ 266.4	$ 768.8
Separation, net of tax (benefit)		60.0
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)	33.1	(10.0)
Amounts reclassified from accumulated other comprehensive income	24.8	33.6
Net current period other comprehensive (loss) income	57.9	23.6
Balance	419.3	266.4
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(71.6)	(33.8)
Separation, net of tax (benefit)		(4.6)
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)	24.5	(33.2)
Net current period other comprehensive (loss) income	24.5	(33.2)
Balance	(47.1)	(71.6)
Derivative (Loss) Gain [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	3.8	(3.3)
Separation, net of tax (benefit)		(0.4)
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)	(0.7)	3.0
Amounts reclassified from accumulated other comprehensive income	0.4	4.5
Net current period other comprehensive (loss) income	(0.3)	7.5
Balance	3.5	3.8
Pension And Postretirement Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(336.0)	(450.3)
Separation, net of tax (benefit)		65.0
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)	9.3	20.2
Amounts reclassified from accumulated other comprehensive income	24.4	29.1
Net current period other comprehensive (loss) income	33.7	49.3
Balance	(302.3)	(336.0)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(403.8)	(487.4)
Balance	$ (345.9)	$ (403.8)