Retirement Benefits (Schedule of Components in Consolidated Balance Sheets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	$ 1,549.4	$ 3,012.4
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Amortization of Net Gains (Losses)	(277.2)
Defined Benefit Plan, Current Assets	881.2	125.5
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	(62.8)	(61.2)
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	1,313.1	2,201.6
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax	3,597.0	5,242.5
Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total	3,102.3	3,105.2
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	(414.7)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax	(3.7)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Amortization of Net Gains (Losses)	(20.0)
Defined Benefit Plan, Current Assets	366.4	0
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	(7.7)	(8.9)
Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent	236.3	810.8
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax	6.6	953.3
Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total	129.0	133.6
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax	(100.5)
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax	$ 35.6