Shareowners' Deficit Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
12. Shareowners Deficit [Abstract]
Net income	$ (30.4)	$ 17.6	$ 13.5	$ 17.9	$ (18.6)	$ 14.5	$ 9.6	$ 22.8	$ 18.6	$ 28.3	$ 89.6
Foreign currency translation loss									(0.1)	0	0
Net income (loss) arising during the period, net of tax of $30.9, $13.9, $(26.3)									(56.5)	(25.1)	44.6
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax									30.9	13.9	(26.3)
Amortization of prior service costs included in net income, net of tax of $4.7, $4.6, $4.1									(8.2)	(8.0)	(7.2)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost Recognized in Net Periodic Pension Cost, Tax Effect									4.7	4.6	4.1
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Tax									(7.6)	(5.3)	(4.8)
Amortization of net loss included in net income, net of tax of $(7.6), $(5.3), $(4.8)									13.2	9.2	8.4
Reclassifiation adjustment for curtailment loss/(gain) included in net income, net of tax of $(1.5) and $2.8									2.7	0	(4.8)
Other Comprehensive Income (Loss), Reclassification Adjustment for Curtailment Included in Net Income, Tax									(1.5)	0	2.8
Other comprehensive (loss) income									(48.9)	(23.9)	41.0
Total comprehensive (loss) income									$ (30.3)	$ 4.4	$ 130.6