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Debt (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013
Short-term debt: |  |
Other short-term debt | $ 3 | $ 4
Total short-term debt | 879 | 1,113
Long-term debt: |  |
Senior notes, net of unamortized discounts of $14 and $15, respectively | 6,711 | 6,710
Unamortized discounts | 14 | 15
Long-term debt, other | 5 | 5
Total long-term debt | 6,818 | 6,715
Total debt | 7,697 | 7,828
Senior notes |  |
Long-term debt: |  |
Senior notes, net of unamortized discounts of $14 and $15, respectively | 6,711 | 6,710
Unamortized discounts | 14 | 15
Commercial paper notes |  |
Short-term debt: |  |
PAA commercial paper notes, short-term | 876 | 1,109
Repayment period | 1 year |
Weighted average interest rate, short-term (as a percent) | 0.30% | 0.33%
Long-term debt: |  |
PAA commercial paper notes, long-term | $ 102 |
Weighted average interest rate, long-term (as a percent) | 0.30% |

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