Shareholders' Equity (Schedule Of Accumulated Other Comprehensive Income Activity) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning of year balance		$ 768.8	$ 649.1
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)	[1]	(10.0)	(34.0)
Amounts reclassified from accumulated other comprehensive income	[1]	33.6	42.1
Net current period other comprehensive (loss) income	[1]	23.6	8.1
End of year balance		266.4	768.8
AFI [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Separation of AFI, net of tax (benefit)	[1]	60.0
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning of year balance	[1]	(33.8)	(8.3)
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)	[1]	(33.2)	(25.5)
Net current period other comprehensive (loss) income	[1]	(33.2)	(25.5)
End of year balance	[1]	(71.6)	(33.8)
Foreign Currency Translation Adjustments [Member] | AFI [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Separation of AFI, net of tax (benefit)	[1]	(4.6)
Derivative Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning of year balance	[1]	(3.3)	(4.0)
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)	[1]	3.0	3.5
Amounts reclassified from accumulated other comprehensive income	[1]	4.5	(2.8)
Net current period other comprehensive (loss) income	[1]	7.5	0.7
End of year balance	[1]	3.8	(3.3)
Derivative Adjustments [Member] | AFI [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Separation of AFI, net of tax (benefit)	[1]	(0.4)
Pension And Postretirement Adjustments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning of year balance	[1]	(450.3)	(483.2)
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)	[1]	20.2	(12.0)
Amounts reclassified from accumulated other comprehensive income	[1]	29.1	44.9
Net current period other comprehensive (loss) income	[1]	49.3	32.9
End of year balance	[1]	(336.0)	(450.3)
Pension And Postretirement Adjustments [Member] | AFI [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Separation of AFI, net of tax (benefit)	[1]	65.0
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning of year balance		(487.4)	(495.5)
End of year balance		$ (403.8)	$ (487.4)

[1] Amounts are net of tax