Company Transformation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Components of transformation costs
Asset impairment			$ 0	$ 55.0
Advisory fees	1.9	22.0	9.1	43.0
IT Costs	1.3	21.2	2.9	21.9
Employee retention and other compensation costs	0.1	7.9	1.1	10.6
Other costs	1.9	11.7	4.4	16.1
Transformation costs before income tax expense (benefit)	5.2	62.8	17.5	146.6
Tax-related separation costs	0	13.9	0	13.9
Tax benefit	(1.9)	(29.6)	(4.2)	(52.1)
Total transformation costs, net of tax benefit	3.3	47.1	13.3	108.4
Continuing Operations [Member]
Components of transformation costs
Asset impairment			0	55.0
Advisory fees	1.8	0	2.8	0
IT Costs	1.3	0	1.9	0
Employee retention and other compensation costs	0.1	2.8	1.1	3.7
Other costs	1.2	1.9	3.5	5.7
Transformation costs before income tax expense (benefit)	4.4	4.7	9.3	64.4
Tax-related separation costs	0	0.3	0	0.3
Tax benefit	(1.7)	2.1	(3.1)	(22.1)
Total transformation costs, net of tax benefit	2.7	2.9	6.2	42.6
Discontinued Operations [Member]
Components of transformation costs
Asset impairment			0	0
Advisory fees	0.1	22.0	6.3	43.0
IT Costs	0	21.2	1.0	21.9
Employee retention and other compensation costs	0	5.1	0	6.9
Other costs	0.7	9.8	0.9	10.4
Transformation costs before income tax expense (benefit)	0.8	58.1	8.2	82.2
Tax-related separation costs	0	13.6	0	13.6
Tax benefit	(0.2)	(27.5)	(1.1)	(30.0)
Total transformation costs, net of tax benefit	$ 0.6	$ 44.2	$ 7.1	$ 65.8