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Goodwill (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2012 BP NGL Acquisition | Dec. 31, 2012 | Dec. 31, 2012 Other acquisitions | Dec. 31, 2013 Transportation | Dec. 31, 2012 Transportation | Dec. 31, 2012 Transportation BP NGL Acquisition | Dec. 31, 2012 Transportation Other acquisitions | Dec. 31, 2013 Facilities | Dec. 31, 2011 Facilities | Dec. 31, 2012 Facilities BP NGL Acquisition | Dec. 31, 2012 Facilities | Dec. 31, 2013 Supply and Logistics | Dec. 31, 2012 Supply and Logistics | Dec. 31, 2012 Supply and Logistics BP NGL Acquisition
Changes in goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ 2,535 | $ 1,854 |  |  |  | $ 897 | $ 818 |  |  | $ 1,171 | $ 609 |  |  | $ 467 | $ 427 |
Acquisitions | 6 |  | 236 | 426 | 10 | 6 |  | 72 | 10 |  |  | 136 | 426 |  |  | 28
Foreign currency translation adjustments | (33) | 7 |  |  |  | (20) | 5 |  |  | (9) |  |  |  | (4) | 2 |
Purchase price accounting adjustments and other | (5) | 2 |  |  |  | (5) | (8) |  |  |  |  |  |  |  | 10 |
Balance at end of period | $ 2,503 | $ 2,535 | $ 236 | $ 426 |  | $ 878 | $ 897 |  |  | $ 1,162 | $ 609 |  |  | $ 463 | $ 467 |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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- Definition Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 + Details
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