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Equity and Distributions, Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Accumulated Other Comprehensive Income (Loss) [Abstract] |  |  |  |
Commodity derivative instruments | $ 10.1 | [1] | $ (21.4) | [1]
Interest rate derivative instruments | (383) | [1] | (329) | [1]
Foreign currency translation adjustment | 1.7 | [2] | 1.7 | [2]
Pension and postretirement benefit plans | 0.8 |  | (1.7) |
Other | 0 |  | (1) |
Total | $ (370.4) |  | $ (351.4) |
[1] | See Note 6 for additional information regarding our derivative instruments.
[2] | Relates to transactions of a Canadian subsidiary.

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