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Business Segments, Consolidated Revenues and Expenses (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Total consolidated revenues | $ 12,093.3 |  | $ 10,468.7 |  | $ 34,625.7 |  | $ 31,511.0 |
Operating costs and expenses: |  |  |  |  |  |  |  |
Cost of sales | 10,371.3 | [1] | 8,794.0 | [1] | 29,522.1 | [1] | 26,655.0 | [1]
Other operating costs and expenses | 612.0 | [2] | 556.1 | [2] | 1,702.4 | [2] | 1,672.9 | [2]
Depreciation, amortization and accretion | 285.2 |  | 269.2 |  | 851.7 |  | 785.1 |
Gains attributable to asset sales and insurance recoveries | (10.2) |  | (2.6) |  | (68.4) |  | (34.1) |
Non-cash asset impairment charges | 15.2 |  | 43.1 |  | 53.3 |  | 57.6 |
General and administrative costs | 43.9 |  | 41.4 |  | 138.9 |  | 130.2 |
Total consolidated costs and expenses | 11,317.4 |  | 9,701.2 |  | 32,200.0 |  | 29,266.7 |
NGL Pipelines and Services [Member] |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Sales of NGLs and related products | 3,929.8 |  | 3,151.9 |  | 10,831.3 |  | 10,401.1 |
Midstream asset services | 300.9 |  | 239.9 |  | 855.3 |  | 677.7 |
Total consolidated revenues | 4,230.7 |  | 3,391.8 |  | 11,686.6 |  | 11,078.8 |
Onshore Natural Gas Pipelines And Services [Member] |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Sales of natural gas | 590.7 |  | 608.2 |  | 1,954.1 |  | 1,691.6 |
Midstream asset services | 244.8 |  | 238.3 |  | 716.6 |  | 708.9 |
Total consolidated revenues | 835.5 |  | 846.5 |  | 2,670.7 |  | 2,400.5 |
Onshore Crude Oil Pipelines and Services [Member] |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Sales of crude oil | 5,359.7 |  | 4,471.8 |  | 15,159.9 |  | 13,093.4 |
Midstream asset services | 77.8 |  | 33.4 |  | 200.3 |  | 74.1 |
Total consolidated revenues | 5,437.5 |  | 4,505.2 |  | 15,360.2 |  | 13,167.5 |
Offshore Pipelines And Services [Member] |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Sales of natural gas | 0.1 |  | 0.2 |  | 0.3 |  | 0.3 |
Sales of crude oil | 1.5 |  | 3.1 |  | 3.7 |  | 4.5 |
Midstream asset services | 38.0 |  | 41.9 |  | 119.5 |  | 145.5 |
Total consolidated revenues | 39.6 |  | 45.2 |  | 123.5 |  | 150.3 |
Petrochemical and Refined Products Services [Member] |  |  |  |  |  |  |  |
Consolidated Revenues [Abstract] |  |  |  |  |  |  |  |
Sales of petrochemicals and refined products | 1,390.1 |  | 1,498.9 |  | 4,271.5 |  | 4,166.9 |
Midstream asset services | 159.9 |  | 181.1 |  | 513.2 |  | 547.0 |
Total consolidated revenues | $ 1,550.0 |  | $ 1,680.0 |  | $ 4,784.7 |  | $ 4,713.9 |
[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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