Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details)

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Employee Benefit Plans - Components of Net Periodic Benefit Cost (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Healthcare cost trend rates:      
Unrecognized gain or loss Percentage for post Retirement plan 50.00%    
Total Defined Benefit Pension Plans
      
Components of net periodic benefit (income) cost      
Service cost $ 38 [1] $ 40 [1] $ 30 [1]
Interest cost 172 180 180
Expected return on plan assets (276) (245) (226)
Amortization of losses, prior service costs and other (7) 5 5
Net periodic benefit (income) cost (73) (20) (11)
Healthcare cost trend rates:      
Estimated net actuarial gain (loss) over the next fiscal year (15)    
U.S. Defined Benefit Pension Plans
      
Components of net periodic benefit (income) cost      
Service cost 0 [1] 0 [1] 0 [1]
Interest cost 90 96 101
Expected return on plan assets (152) (141) (138)
Amortization of losses, prior service costs and other 2 5 5
Net periodic benefit (income) cost (60) (40) (32)
Weighted average assumptions used to determine net cost for years ended December 31      
Discount rate 4.70% 5.30% 5.80%
Expected return on plan assets 5.30% 10.00% 10.00%
Non-U.S. Defined Benefit Pension Plans
      
Components of net periodic benefit (income) cost      
Service cost 38 [1],[2] 40 [1],[2] 30 [1]
Interest cost 82 [2] 84 [2] 79
Expected return on plan assets (124) (104) (88)
Amortization of losses, prior service costs and other (9) 0 0
Net periodic benefit (income) cost (13) 20 21
Weighted average assumptions used to determine net cost for years ended December 31      
Discount rate 4.80% 5.30% 5.40%
Expected return on plan assets 6.80% 10.00% 10.00%
Rate of compensation increase 4.50% 0.00% 0.00%
Postretirement Plans
      
Components of net periodic benefit (income) cost      
Service cost 4 [3] 4 [3] 3
Interest cost 14 [3] 15 [3] 17
Amortization of losses, prior service costs and other 7 8 10
Net periodic benefit (income) cost 25 27 30
Weighted average assumptions used to determine net cost for years ended December 31      
Discount rate 4.70% 5.20% 5.80%
Healthcare cost trend rates:      
Initial 10.00% 10.00% 10.00%
Long-term 10.00% 10.00% 10.00%
Estimated net actuarial gain (loss) over the next fiscal year $ (5)    
[1] The U.S. plan was terminated in 1988 and thus does not incur service costs.
[2] Primarily represents the U.K. pension plan, which accounts for 83% of the fair value of plan assets and 70% of the benefit obligation at December 31, 2012.
[3] Approximately 92% of the postretirement benefit obligation at December 31, 2012 relates to the U.S. postretirement plan.