Annual report pursuant to Section 13 and 15(d)

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

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Employee Benefit Plans - Components of Periodic Benefit Cost (Income) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Nonqualified and Other Pension Plans [Member]
      
Components of net periodic benefit cost      
Service cost $ 1 [1] $ 1 [1] $ 3
Interest cost 120 [1] 138 [1] 152
Expected return on plan assets (109) (152) (141)
Amortization of transition obligation 0 0 0
Amortization of prior service cost (credits) 0 (3) (8)
Amortization of net actuarial loss (gain) 25 8 16
Recognized loss due to settlements and curtailments 2 0 3
Net periodic benefit cost (income) 39 (8) 25
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 3.65% 4.65% 5.20%
Expected return on plan assets 3.75% 5.25% 5.25%
Rate of compensation increase 4.00% 4.00% 4.00%
Postretirement Health and Life Plans [Member]
      
Components of net periodic benefit cost      
Service cost 9 [1] 13 [1] 15
Interest cost 54 [1] 71 [1] 80
Expected return on plan assets (5) (8) (9)
Amortization of transition obligation 0 32 31
Amortization of prior service cost (credits) 4 4 4
Amortization of net actuarial loss (gain) (42) (38) (17)
Recognized loss due to settlements and curtailments 6 0 0
Net periodic benefit cost (income) 26 74 104
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 3.65% 4.65% 5.10%
Expected return on plan assets 6.50% 8.00% 8.00%
Qualified Pension Plans [Member]
      
Components of net periodic benefit cost      
Service cost 0 [1] 236 [1] 423
Interest cost 623 [1] 681 [1] 746
Expected return on plan assets (1,024) (1,246) (1,296)
Amortization of prior service cost (credits) 0 9 20
Amortization of net actuarial loss (gain) 242 469 387
Recognized loss due to settlements and curtailments 17 58 0
Net periodic benefit cost (income) (142) 207 280
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 4.00% 4.95% 5.45%
Expected return on plan assets 6.50% 8.00% 8.00%
Rate of compensation increase   4.00% 4.00%
Non-U.S. Pension Plans [Member]
      
Components of net periodic benefit cost      
Service cost 32 [1] 40 [1] 43
Interest cost 98 [1] 97 [1] 99
Expected return on plan assets (121) (137) (115)
Amortization of prior service cost (credits) 0 0 0
Amortization of net actuarial loss (gain) 2 (9) 0
Recognized loss due to settlements and curtailments (7) 0 0
Net periodic benefit cost (income) $ 4 $ (9) $ 27
Weighted-average assumptions used to determine net cost for years ended December 31      
Discount rate 4.23% 4.87% 5.32%
Expected return on plan assets 5.50% 6.65% 6.58%
Rate of compensation increase 4.37% 4.42% 4.85%
[1] The measurement date for the Qualified Pension Plan, Non-U.S. Pension Plans, Nonqualified and Other Pension Plans, and Postretirement Health and Life Plans was December 31 of each year reported.