| **Short-Term Borrowings**      | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
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| **Short-term Debt [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| Short-Term Borrowings          | SHORT-TERM BORROWINGS Short-term borrowings outstanding as of December 31, were comprised of the following: (Millions of dollars)      2015 2014  Balance Avg. Rate Balance Avg. RateCommercial paper, net $5,811 0.5% $3,688 0.3%Bank borrowings 440 9.3% 411 6.8%Variable denomination floating rate demand notes 707 0.8% 600 0.8%Total $6,958   $4,699            |

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No definition available.
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| - Definition
The entire disclosure for short-term debt.
+ References
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