Pension and Postretirement Plans Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Pension Plan, Defined Benefit [Member]
Prior service cost recognized:
Reclassification adjustments	$ (0.4)	$ 0.1
Prior service credit	0	0
Actuarial loss recognized:
Reclassification adjustments	22.0	19.4
Actuarial loss arising during the period	67.5	(12.5)
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (benefit)	0.2
Actuarial loss	16.7
Total	16.9
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Prior service (cost) benefit, net of tax of $0.3, $0.2, $(26.8), $(26.0)	(0.6)	(0.3)
Actuarial loss, net of tax of $77.2, $109.0, $26.6, $35.6	(134.8)	(192.5)
Total	(135.4)	(192.8)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax Effect [Abstract]
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Prior Service (Cost) Benefit, Tax Effect	0.3	0.2
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), Tax Effect	77.2	109.0
Other Postretirement Benefit Plan, Defined Benefit [Member]
Prior service cost recognized:
Reclassification adjustments	(14.1)	(13.2)
Prior service credit	17.4	0
Actuarial loss recognized:
Reclassification adjustments	5.6	6.8
Actuarial loss arising during the period	20.0	(1.8)
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (benefit)	(15.4)
Actuarial loss	5.2
Total	(10.2)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Prior service (cost) benefit, net of tax of $0.3, $0.2, $(26.8), $(26.0)	48.4	45.9
Actuarial loss, net of tax of $77.2, $109.0, $26.6, $35.6	(46.1)	(62.7)
Total	2.3	(16.8)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax Effect [Abstract]
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Prior Service (Cost) Benefit, Tax Effect	(26.8)	(26.0)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), Tax Effect	$ 26.6	$ 35.6