Pensions and Postretirement Benefits Other Than Pensions (Schedule of Net Periodic Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011 Pension Cost [Member]	Dec. 31, 2010 Pension Cost [Member]	Dec. 31, 2009 Pension Cost [Member]	Dec. 31, 2011 Segment, Continuing Operations [Member] Pension Cost [Member]	Dec. 31, 2010 Segment, Continuing Operations [Member] Pension Cost [Member]	Dec. 31, 2009 Segment, Continuing Operations [Member] Pension Cost [Member]	Dec. 31, 2011 Segment, Discontinued Operations [Member] Pension Cost [Member]	Dec. 31, 2010 Segment, Discontinued Operations [Member] Pension Cost [Member]	Dec. 31, 2009 Segment, Discontinued Operations [Member] Pension Cost [Member]
Service cost		$ 93.5	$ 87.1	$ 65.4
Interest cost		185.5	194.5	197.2
Expected return on plan assets		(219.6)	(196.3)	(178.4)
Prior service costs, net amortization of	(5.5)	5.6	8.2	8.5
Transition amount, net amortization of		0	0.1	0.2
Plan net actuarial losses, net amortization of	8.5	51.1	55.5	59.4
Net periodic pension benefit cost		116.1	149.1	152.3
Net curtailment and settlement (gains) losses		62.5	6.2	2.0
Net periodic benefit cost after net curtailment and settlement (gains) losses		$ 178.6	$ 155.3	$ 154.3	$ 177.2	$ 148.4	$ 142.9	$ 1.4	$ 6.9	$ 11.4