Accumulated Other Comprehensive (Loss) (Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			$ (487.4)	$ (495.5)
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)			(15.3)	(5.0)
Amounts reclassified from accumulated other comprehensive (loss)			20.0	17.1
Total other comprehensive (loss) income	$ (6.1)	$ 16.0	4.7	12.1
Ending Balance	(425.9)	(483.4)	(425.9)	(483.4)
Other comprehensive (loss) income before reclassifications, tax expense (benefit)			4.1	(2.6)
AFI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Separation of AFI, net of tax (benefit)			56.8
Separation of AFI, tax (benefit)			(37.8)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(33.8)	(8.3)
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)			(11.8)	(7.9)
Total other comprehensive (loss) income			(11.8)	(7.9)
Ending Balance	(50.2)	(16.2)	(50.2)	(16.2)
Foreign Currency Translation Adjustments [Member] | AFI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Separation of AFI, net of tax (benefit)			(4.6)
Derivative Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(3.3)	(4.0)
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)			(6.6)	(0.1)
Amounts reclassified from accumulated other comprehensive (loss)			6.1	(1.0)
Total other comprehensive (loss) income			(0.5)	(1.1)
Ending Balance	(4.2)	(5.1)	(4.2)	(5.1)
Other comprehensive (loss) income before reclassifications, tax expense (benefit)			3.9	0.4
Derivative Adjustments [Member] | AFI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Separation of AFI, net of tax (benefit)			(0.4)
Pension And Postretirement Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance			(450.3)	(483.2)
Other comprehensive (loss) income before reclassifications, net of tax expense (benefit)			3.1	3.0
Amounts reclassified from accumulated other comprehensive (loss)			13.9	18.1
Total other comprehensive (loss) income			17.0	21.1
Ending Balance	$ (371.5)	$ (462.1)	(371.5)	(462.1)
Other comprehensive (loss) income before reclassifications, tax expense (benefit)			0.2	$ (3.0)
Pension And Postretirement Adjustments [Member] | AFI [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Separation of AFI, net of tax (benefit)			61.8
Separation of AFI, tax (benefit)			$ (37.8)