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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2012
Summary of Significant Accounting Policies [Abstract] |
Allowance for Doubtful Accounts Activity | The following table presents our allowance for doubtful accounts activity for the periods presented:
|  | For Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Balance at beginning of period |  | $ | 13.4 |  |  | $ | 18.4 |  |  | $ | 16.8 |
Charged to costs and expenses |  |  | 0.3 |  |  |  | 0.8 |  |  |  | 2.6 |
Acquisition-related additions and other |  |  | -- |  |  |  | -- |  |  |  | 1.1 |
Deductions (1) |  |  | (0.5 | ) |  |  | (5.8 | ) |  |  | (2.1 | )
Balance at end of period |  | $ | 13.2 |  |  | $ | 13.4 |  |  | $ | 18.4 |
(1) The 2011 deduction amount is primarily due to our reassessment of the allowance for doubtful accounts as a result of improved credit ratings of a customer, which reduced our exposure to potential uncollectibility. |
Environmental Reserves Activity | The following table presents the activity of our environmental reserves for the periods presented:
|  | For Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Balance at beginning of period |  | $ | 12.3 |  |  | $ | 12.4 |  |  | $ | 16.7 |
Charged to costs and expenses |  |  | 13.9 |  |  |  | 9.3 |  |  |  | 2.8 |
Acquisition-related additions and other |  |  | 5.2 |  |  |  | 1.0 |  |  |  | 0.9 |
Deductions |  |  | (17.7 | ) |  |  | (10.4 | ) |  |  | (8.0 | )
Balance at end of period |  | $ | 13.7 |  |  | $ | 12.3 |  |  | $ | 12.4 |
Schedule of Other Nonoperating Income | The following table presents the components of "Other, net" as presented on our Statements of Consolidated Operations for the periods presented:
|  | For Year Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Gain on sales of available-for-sale equity securities of Energy Transfer Equity (1) |  | $ | 68.8 |  |  | $ | -- |  |  | $ | -- |
Distribution income from Energy Transfer Equity |  |  | 4.1 |  |  |  | -- |  |  |  | -- |
Other |  |  | (0.3 | ) |  |  | (0.6 | ) |  |  | 2.7 |
Total |  | $ | 72.6 |  |  | $ | (0.6 | ) |  | $ | 2.7 |
(1) See Note 9 for information regarding the liquidation of our investment in limited partnership units of Energy Transfer Equity. |

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- Definition Tabular disclosure of material changes in the expected aggregate amount of environmental loss contingencies since the prior balance sheet date. This element may be used for an entity's entire roll forward of environmental loss contingencies. + References No definition available. + Details
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- Definition Tabular disclosure of the detailed components of other nonoperating income. May include methodology, assumptions and amounts for: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 + Details
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