Pensions and Postretirement Benefits Other Than Pensions (Schedule of Net Periodic Benefit Cost) (Details) (Pension Costs [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Service cost	$ 68.7	$ 88.5	$ 96.8
Interest cost	147.2	156.9	163.6
Expected return on plan assets	(156.1)	(166.3)	(173.6)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	4.4	4.7	5.1
Plan net actuarial losses, net amortization of	36.1	63.0	60.6
Net periodic benefit cost	100.3	146.8	152.5
Net curtailment and settlement (gains) losses	7.1	0.7	4.9
Net periodic benefit cost after net curtailment and settlement (gains) losses	107.4	147.5	157.4
Segment, Continuing Operations [Member]
Net periodic benefit cost after net curtailment and settlement (gains) losses	100.2	119.2	125.5
Segment, Discontinued Operations [Member]
Net periodic benefit cost after net curtailment and settlement (gains) losses	$ 7.2	$ 28.3	$ 31.9