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Business Segments, Consolidated Revenues and Expenses (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Total consolidated revenues | $ 11,149.3 |  | $ 9,789.8 |  | $ 22,532.4 |  | $ 21,042.3 |
Operating costs and expenses: |  |  |  |  |  |  |  |
Cost of sales | 9,458.3 | [1] | 8,195.2 | [1] | 19,150.8 | [1] | 17,861.0 | [1]
Other operating costs and expenses | 586.4 | [2] | 572.9 | [2] | 1,090.4 | [2] | 1,116.8 | [2]
Depreciation, amortization and accretion | 289.7 |  | 261.3 |  | 566.5 |  | 515.9 |
Losses (gains) attributable to asset sales and insurance recoveries | 5.7 |  | (29.0) |  | (58.2) |  | (31.5) |
Non-cash asset impairment charges | 27.1 |  | 9.1 |  | 38.1 |  | 14.5 |
General and administrative costs | 45.5 |  | 42.5 |  | 95.0 |  | 88.8 |
Total consolidated costs and expenses | 10,412.7 |  | 9,052.0 |  | 20,882.6 |  | 19,565.5 |
NGL Pipelines and Services [Member] |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Sales of NGLs and related products | 3,235.9 |  | 3,133.9 |  | 6,901.5 |  | 7,249.2 |
Midstream asset services | 269.0 |  | 198.6 |  | 554.4 |  | 437.8 |
Total consolidated revenues | 3,504.9 |  | 3,332.5 |  | 7,455.9 |  | 7,687.0 |
Onshore Natural Gas Pipelines And Services [Member] |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Sales of natural gas | 723.9 |  | 510.8 |  | 1,363.4 |  | 1,083.4 |
Midstream asset services | 233.6 |  | 209.6 |  | 471.8 |  | 470.6 |
Total consolidated revenues | 957.5 |  | 720.4 |  | 1,835.2 |  | 1,554.0 |
Onshore Crude Oil Pipelines and Services [Member] |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Sales of crude oil | 5,057.4 |  | 4,174.0 |  | 9,800.2 |  | 8,621.6 |
Midstream asset services | 72.1 |  | 14.7 |  | 122.5 |  | 40.7 |
Total consolidated revenues | 5,129.5 |  | 4,188.7 |  | 9,922.7 |  | 8,662.3 |
Offshore Pipelines And Services [Member] |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Sales of natural gas | 0.1 |  | 0 |  | 0.2 |  | 0.1 |
Sales of crude oil | (0.1) |  | 0 |  | 2.2 |  | 1.4 |
Midstream asset services | 41.3 |  | 49.0 |  | 81.5 |  | 103.6 |
Total consolidated revenues | 41.3 |  | 49.0 |  | 83.9 |  | 105.1 |
Petrochemical and Refined Products Services [Member] |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Sales of petrochemicals and refined products | 1,334.2 |  | 1,316.8 |  | 2,881.4 |  | 2,668.0 |
Midstream asset services | 181.9 |  | 182.4 |  | 353.3 |  | 365.9 |
Total consolidated revenues | $ 1,516.1 |  | $ 1,499.2 |  | $ 3,234.7 |  | $ 3,033.9 |
[1] | Cost of sales is a component of "Operating costs and expenses," as presented on our Unaudited Condensed Statements of Consolidated Operations. Period-to-period fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities.
[2] | Represents cost of operating our plants, pipelines and other fixed assets, excluding depreciation, amortization and accretion charges.

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