v2.4.0.6
Retirement Plans (Schedule Of Changes In Defined Benefit Plan Obligations)(Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets at beginning of year $ 632    
Employer contributions 454    
Fair value of plan assets at end of year 1,187    
Pension Benefits [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligation at beginning of year, Other Postretirement Benefits 1,000    
Benefit obligation at beginning of year,pension benefits 1,124 980  
Service cost 37 33 43
Interest cost 60 58 58
Actuarial loss (gain) 123 82  
Plan amendments   5  
Foreign exchange rate changes (1) 2  
Benefits paid (40) (36)  
Benefit obligation at end of year, pension benefits 1,303 1,124 980
Benefit obligation at end of year, Other Postretirement Benefits 1,200 1,000  
Fair value of plan assets at beginning of year 632 532  
Actual return on plan assets 141 69  
Employer contributions 454 66  
Foreign exchange rate changes   1  
Fair value of plan assets at end of year 1,187 632 532
Funded status at end of year (116) (492)  
Noncurrent assets 116 2  
Current liabilities (10) (9)  
Noncurrent liabilities (222) (485)  
Net amount (116) (492)  
Net actuarial loss (gain) 348 357  
Prior service cost (credit) 18 21  
Total 366 378  
Other Postretirement Benefits [Member]
      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligation at beginning of year, Other Postretirement Benefits 43 64  
Service cost 1 1 1
Interest cost 2 3 3
Actuarial loss (gain) (8) 1  
Plan amendments 5 (22)  
Plan settlements (4)    
Participant contributions 3 2  
Benefits paid (5) (6)  
Benefit obligation at end of year, Other Postretirement Benefits 37 43 64
Employer contributions 7 4  
Plan settlements (5)    
Funded status at end of year (37) (43)  
Current liabilities (3) (4)  
Noncurrent liabilities (34) (39)  
Net amount (37) (43)  
Net actuarial loss (gain) (9) (5)  
Prior service cost (credit) (5) (12)  
Total $ (14) $ (17)