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Fair Value (Recurring Measurements) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Debt securities: |  |  |  |
Unsecured debentures | $ 435 | [1] | $ 448 | [1]
Certificates of deposit | 151 | [1] | 143 | [1]
Government debt securities | 25 | [1] | 34 | [1]
Subtotal | 611 | [1] | 625 | [1]
Equity securities: |  |  |  |
Mutual funds | 44 | [1] | 56 | [1]
Subtotal | 44 | [1] | 56 | [1]
Total available-for-sale | 655 | [1] | 681 | [1]
Equity securities: |  |  |  |
Mutual funds | 13 |  | 12 |
Total trading | 13 |  | 12 |
DERIVATIVES: |  |  |  |
Total derivatives | 240 |  | 100 |
TOTAL ASSETS | 908 |  | 793 |
DERIVATIVES: |  |  |  |
Total derivatives | 371 |  | 602 |
TOTAL LIABILITIES | 371 |  | 602 |
Interest rate derivatives |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 98 |  | 2 |
DERIVATIVES: |  |  |  |
Total derivatives | 322 |  | 565 |
Cross Currency |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 5 |  | 6 |
DERIVATIVES: |  |  |  |
Total derivatives | 11 |  | 6 |
Foreign currency derivatives |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 113 |  | 81 |
DERIVATIVES: |  |  |  |
Total derivatives | 21 |  | 14 |
Commodity |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 24 |  | 11 |
DERIVATIVES: |  |  |  |
Total derivatives | 17 |  | 17 |
Level 1 |  |  |  |
Debt securities: |  |  |  |
Unsecured debentures | 0 | [1] | 0 | [1]
Certificates of deposit | 0 | [1] | 0 | [1]
Government debt securities | 0 | [1] | 0 | [1]
Subtotal | 0 | [1] | 0 | [1]
Equity securities: |  |  |  |
Mutual funds | 0 | [1] | 0 | [1]
Subtotal | 0 | [1] | 0 | [1]
Total available-for-sale | 0 | [1] | 0 | [1]
Equity securities: |  |  |  |
Mutual funds | 13 |  | 12 |
Total trading | 13 |  | 12 |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
TOTAL ASSETS | 13 |  | 12 |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
TOTAL LIABILITIES | 0 |  | 0 |
Level 1 | Interest rate derivatives |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
Level 1 | Cross Currency |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
Level 1 | Foreign currency derivatives |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
Level 1 | Commodity |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
Level 2 |  |  |  |
Debt securities: |  |  |  |
Unsecured debentures | 435 | [1] | 448 | [1]
Certificates of deposit | 151 | [1] | 143 | [1]
Government debt securities | 25 | [1] | 34 | [1]
Subtotal | 611 | [1] | 625 | [1]
Equity securities: |  |  |  |
Mutual funds | 44 | [1] | 56 | [1]
Subtotal | 44 | [1] | 56 | [1]
Total available-for-sale | 655 | [1] | 681 | [1]
Equity securities: |  |  |  |
Mutual funds | 0 |  | 0 |
Total trading | 0 |  | 0 |
DERIVATIVES: |  |  |  |
Total derivatives | 136 |  | 18 |
TOTAL ASSETS | 791 |  | 699 |
DERIVATIVES: |  |  |  |
Total derivatives | 263 |  | 179 |
TOTAL LIABILITIES | 263 |  | 179 |
Level 2 | Interest rate derivatives |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 98 |  | 2 |
DERIVATIVES: |  |  |  |
Total derivatives | 221 |  | 153 |
Level 2 | Cross Currency |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 5 |  | 6 |
DERIVATIVES: |  |  |  |
Total derivatives | 11 |  | 6 |
Level 2 | Foreign currency derivatives |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 15 |  | 2 |
DERIVATIVES: |  |  |  |
Total derivatives | 16 |  | 7 |
Level 2 | Commodity |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 18 |  | 8 |
DERIVATIVES: |  |  |  |
Total derivatives | 15 |  | 13 |
Level 3 |  |  |  |
Debt securities: |  |  |  |
Unsecured debentures | 0 | [1] | 0 | [1]
Certificates of deposit | 0 | [1] | 0 | [1]
Government debt securities | 0 | [1] | 0 | [1]
Subtotal | 0 | [1] | 0 | [1]
Equity securities: |  |  |  |
Mutual funds | 0 | [1] | 0 | [1]
Subtotal | 0 | [1] | 0 | [1]
Total available-for-sale | 0 | [1] | 0 | [1]
Equity securities: |  |  |  |
Mutual funds | 0 |  | 0 |
Total trading | 0 |  | 0 |
DERIVATIVES: |  |  |  |
Total derivatives | 104 |  | 82 |
TOTAL ASSETS | 104 |  | 82 |
DERIVATIVES: |  |  |  |
Total derivatives | 108 |  | 423 |
TOTAL LIABILITIES | 108 |  | 423 |
Level 3 | Interest rate derivatives |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
DERIVATIVES: |  |  |  |
Total derivatives | 101 |  | 412 |
Level 3 | Cross Currency |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
DERIVATIVES: |  |  |  |
Total derivatives | 0 |  | 0 |
Level 3 | Foreign currency derivatives |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 98 |  | 79 |
DERIVATIVES: |  |  |  |
Total derivatives | 5 |  | 7 |
Level 3 | Commodity |  |  |  |
DERIVATIVES: |  |  |  |
Total derivatives | 6 |  | 3 |
DERIVATIVES: |  |  |  |
Total derivatives | $ 2 |  | $ 4 |
[1] | Amortized cost approximated fair value at December 31, 2013 and 2012.

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