v2.4.0.6
Retirement Benefits (Schedule of Expected Benefit Payments, Contributions and Expense) (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Defined Benefit Plan, Accumulated Benefit Obligation   $ 8,200,000,000 $ 7,230,000,000  
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Projected Benefit Obligation   8,120,000,000 7,120,000,000  
Defined Benefit Plan, Plans with Projected Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets   5,960,000,000 5,930,000,000  
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Aggregate Benefit Obligation   7,030,000,000 1,100,000,000  
Defined Benefit Plan, Plans with Benefit Obligations in Excess of Plan Assets, Aggregate Fair Value of Plan Assets   5,750,000,000 136,300,000  
Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation   209,400,000    
Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components   15,100,000    
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation   187,100,000    
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components   12,300,000    
Defined benefit pension and retiree health benefit plans   (1,240,200,000) 148,900,000 (280,300,000)
Defined Contribution Plan, Cost Recognized   117,600,000 119,800,000 127,600,000
Pension Plans, Defined Benefit [Member]
        
Defined Benefit Plan, Expected Future Benefit Payments in Year One   416,100,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Two   424,200,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Three   437,200,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Four   449,900,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Five   464,200,000    
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter   2,609,200,000    
Defined Benefit Plan, Service Cost   236,300,000 219,200,000 242,100,000
Defined Benefit Plan, Interest Cost   447,900,000 431,600,000 417,500,000
Defined Benefit Plan, Expected Return on Plan Assets   (685,900,000) (638,200,000) (584,900,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)   8,600,000 8,800,000 8,000,000
Defined Benefit Plan, Amortization of Net Gains (Losses)   200,400,000 163,000,000 84,500,000
Defined Benefit Plan, Net Periodic Benefit Cost, Total   207,300,000 184,400,000 167,200,000
Other Comprehensive Income, Defined Benefit Plan's Net Unamortized Gain (Loss) Arising During Period, before Tax   1,266,000,000    
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, before Tax   10,000,000    
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax 3,300,000 (8,600,000)    
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax 285,300,000 (200,400,000)    
Foreign currency translation gains (losses)   (4,900,000)    
Defined benefit pension and retiree health benefit plans   1,062,100,000    
Other Postretirement Benefit Plans, Defined Benefit [Member]
        
Defined Benefit Plan, Expected Future Benefit Payments in Year One   107,000,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Two   109,200,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Three   112,600,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Four   114,900,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Five   121,700,000    
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter   699,100,000    
Defined Benefit Plan, Service Cost   72,400,000 56,500,000 53,700,000
Defined Benefit Plan, Interest Cost   118,000,000 121,400,000 119,600,000
Defined Benefit Plan, Expected Return on Plan Assets   (129,400,000) (122,600,000) (117,900,000)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)   (42,900,000) (37,200,000) (36,000,000)
Defined Benefit Plan, Amortization of Net Gains (Losses)   88,700,000 85,000,000 71,800,000
Defined Benefit Plan, Net Periodic Benefit Cost, Total   106,800,000 103,100,000 91,200,000
Other Comprehensive Income, Defined Benefit Plan's Net Unamortized Gain (Loss) Arising During Period, before Tax   221,300,000    
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Arising During Period, before Tax   1,100,000    
Other Comprehensive Income (Loss), Amortization, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit) Recognized in Net Periodic Benefit Cost, before Tax 35,100,000 42,900,000    
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Gain (Loss), before Tax 95,700,000 (88,700,000)    
Foreign currency translation gains (losses)   1,500,000    
Defined benefit pension and retiree health benefit plans   178,100,000    
Other Postretirement Benefit Plans, Defined Benefit, Gross [Member]
        
Defined Benefit Plan, Expected Future Benefit Payments in Year One   118,700,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Two   119,100,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Three   123,600,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Four   127,300,000    
Defined Benefit Plan, Expected Future Benefit Payments in Year Five   135,200,000    
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter   790,800,000    
Other Postretirement Benefit Plans, Defined Benefit Plans, Medicare Rebates [Member]
        
Defined Benefit Plan, Expected Future Benefit Payments in Year One   (11,700,000)    
Defined Benefit Plan, Expected Future Benefit Payments in Year Two   (9,900,000)    
Defined Benefit Plan, Expected Future Benefit Payments in Year Three   (11,000,000)    
Defined Benefit Plan, Expected Future Benefit Payments in Year Four   (12,400,000)    
Defined Benefit Plan, Expected Future Benefit Payments in Year Five   (13,500,000)    
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter   $ (91,700,000)