Pensions and Postretirement Benefits Other than Pensions (Components of the Company's Pension-Related Costs) (Details) (Pension Cost [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Service cost	$ 23.5	$ 23.1	$ 73.0	$ 71.4
Interest cost	40.9	46.3	122.3	141.8
Expected return on plan assets	(43.9)	(55.8)	(129.5)	(167.8)
Net amortization of prior service costs	1.3	1.5	4.0	4.3
Net amortization of plan net actuarial losses	15.7	12.0	45.0	39.4
Net periodic pension benefit cost	37.5	27.1	114.8	89.1
Net curtailment and settlement (gains) losses	0.4	1.6	4.5	7.4
Total	37.9	28.7	119.3	96.5
Segment, Continuing Operations [Member]
Total	36.6	28.1	112.2	95.5
Segment, Discontinued Operations [Member]
Total	$ 1.3	$ 0.6	$ 7.1	$ 1.0