Retirement Benefits (Fair Value Disclosures) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended							12 Months Ended									12 Months Ended																																																																																			12 Months Ended									12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2011 Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fixed Income Funds [Member]	Dec. 31, 2013 Fixed Income Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fixed Income Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fixed Income Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fixed Income Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Equity Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Equity Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Equity Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Equity Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Equity Securities [Member]	Dec. 31, 2013 Equity Securities [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Equity Securities [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Equity Securities [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Equity Securities [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Equity Securities - International [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Equity Securities - International [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Equity Securities - International [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Equity Securities - International [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fixed Income Funds, Emerging Markets [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fixed Income Funds, Emerging Markets [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fixed Income Funds, Emerging Markets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fixed Income Funds, Emerging Markets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Hedge Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Hedge Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Hedge Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Hedge Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Real Estate [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Real Estate [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Real Estate [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Real Estate [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Other Assets [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Other Assets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Other Contract [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Other Contract [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Other Plan Assets [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Other Plan Assets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Fixed Income Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Fixed Income Funds Developed Markets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Equity Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Equity Securities [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Equity Securities [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Equity Securities [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Equity Securities [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Equity Securities - International [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Equity Securities - International [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Equity Securities - International [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Equity Securities - International [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Real Estate [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Real Estate [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Real Estate [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Real Estate [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Other Assets [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 1 [Member] Other Assets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Other Plan Assets [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 1 [Member] Other Plan Assets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Fixed Income Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Fixed Income Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Fixed Income Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Fixed Income Funds Developed Markets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Equity Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Equity Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Equity Securities [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Equity Securities [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Equity Securities [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Equity Securities [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Equity Securities - International [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Equity Securities - International [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Equity Securities - International [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Equity Securities - International [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Fixed Income Funds, Emerging Markets [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Fixed Income Funds, Emerging Markets [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Fixed Income Funds, Emerging Markets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Fixed Income Funds, Emerging Markets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Hedge Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Hedge Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Hedge Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Hedge Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Real Estate [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Other Assets [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Other Assets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member] Other Contract [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Other Contract [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Other Plan Assets [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member] Other Plan Assets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] Fixed Income Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] Fixed Income Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] Fixed Income Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] Fixed Income Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] Fixed Income Funds Developed Markets [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] Equity Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] Equity Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] Equity Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] Equity Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] Hedge Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] Hedge Funds [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] Hedge Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] Hedge Funds [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member] Real Estate [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member] Real Estate [Member] Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Percentage of Global Investments in Plan Assets	80.00%
Defined Benefit Plan, Target Allocation Percentage of Assets								20.00%									80.00%
Defined Benefit Plan, Fair Value of Plan Assets, Ending Balance		$ 1,879.6	$ 1,518.0	$ 1,339.0	$ 9,481.7	$ 8,286.6	$ 7,186.3		$ 54.7	$ 59.4	$ 1,036.1	$ 1,075.4	$ 88.9	$ 81.9	$ 1,069.9	$ 991.2		$ 39.4	$ 45.4	$ 400.3	$ 457.7	$ 167.2	$ 127.7	$ 2,483.8	$ 1,905.3	$ 38.2	$ 40.3	$ 382.6	$ 402.3	$ 266.4	$ 234.0	$ 2,902.3	$ 2,555.5	$ 36.7	$ 35.4	$ 521.4	$ 504.3	$ 51.3	$ 685.3	$ 1,136.8	$ 869.1	$ 24.8	$ 394.9	$ 134.6	$ 105.9	$ 2,018.4	$ 1,648.6	$ 170.2	$ 156.4	$ 17.4	$ 18.3	$ 30.4	$ 189.2	$ 307.9	$ 61.6	$ 33.9	$ 1,045.8	$ 673.3	$ 36.7	$ 35.4	$ 368.0	$ 353.5	$ 18.0	$ 245.2	$ 6.2	$ 140.1	$ 1,533.9	$ 1,229.9	$ 4,860.1	$ 4,363.1	$ 53.1	$ 59.0	$ 850.0	$ 915.3	$ 76.4	$ 63.3	$ 21.1	$ 15.0	$ 211.1	$ 149.8	$ 105.6	$ 93.8	$ 1,438.0	$ 1,232.0	$ 38.2	$ 40.3	$ 382.6	$ 402.3	$ 145.8	$ 134.1	$ 1,461.9	$ 1,337.4	$ 8.2	$ 33.3	$ 440.1	$ 1,136.8	$ 869.1	$ 18.6	$ 254.8	$ 211.1	$ 182.2	$ 2,603.2	$ 2,274.9	$ 1.6	$ 0.4	$ 15.9	$ 3.7	$ 3.7	$ 88.9	$ 81.9	$ 993.5	$ 910.5	$ 120.6	$ 99.9	$ 1,440.4	$ 1,218.1	$ 153.4	$ 142.6
Defined Benefit Plan, Fair Value of Plan Assets, Beginning Balance		1,879.6	1,518.0	1,339.0	9,481.7	8,286.6	7,186.3		54.7	59.4	1,036.1	1,075.4	88.9	81.9	1,069.9	991.2		39.4	45.4	400.3	457.7	167.2	127.7	2,483.8	1,905.3	38.2	40.3	382.6	402.3	266.4	234.0	2,902.3	2,555.5	36.7	35.4	521.4	504.3	51.3	685.3	1,136.8	869.1	24.8	394.9	134.6	105.9	2,018.4	1,648.6	170.2	156.4	17.4	18.3	30.4	189.2	307.9	61.6	33.9	1,045.8	673.3	36.7	35.4	368.0	353.5	18.0	245.2	6.2	140.1	1,533.9	1,229.9	4,860.1	4,363.1	53.1	59.0	850.0	915.3	76.4	63.3	21.1	15.0	211.1	149.8	105.6	93.8	1,438.0	1,232.0	38.2	40.3	382.6	402.3	145.8	134.1	1,461.9	1,337.4	8.2	33.3	440.1	1,136.8	869.1	18.6	254.8	182.2	185.2	2,274.9	2,256.6	0.4	0	3.7	0	3.7	81.9	79.9	910.5	870.2	99.9	105.3	1,218.1	1,248.4	142.6	138.0
Defined Benefit Plan, Actual Return on Plan Assets Still Held																																																																																																				23.9	(0.9)	284.6	32.0	(0.3)	0	(3.0)	0.3		13.9	0	155.7	10.1	10.3	(0.9)	123.4	18.3	8.5	3.3
Defined Benefit Plan, Actual Return on Plan Assets Sold During Period																																																																																																				0	0	0	(0.2)	0	0	0	0		0	0	0	0	0	0	0	(0.2)	0	0
Defined Benefit Plan, Purchases, Sales, and Settlements																																																																																																				3.9		32.2		0.4		3.7			(6.9)		(72.7)		10.4		98.9		2.3
Defined Benefit Plan, Business Combinations and Acquisitions, Plan Assets																																																																																																					(2.2)		(14.6)		0.3		2.3			2.0		30.2		(4.5)		(48.4)		1.3
Defined Benefit Plan, Transfers Between Measurement Levels																																																																																																				$ 1.1	$ 0.1	$ 11.5	$ 1.1	$ 1.1	$ 0.1	$ 11.5	$ 1.1		$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0