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UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED EQUITY (USD $) In Millions, unless otherwise specified | Limited Partners [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Noncontrolling Interests [Member] | Total
--- | --- | --- | --- | ---
Balance at Dec. 31, 2011 | $ 12,464.8 | $ (351.4) | $ 105.9 | $ 12,219.3
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |
Net income | 1,217.6 | 0 | 5.1 | 1,222.7
Cash distributions paid to limited partners | (1,068.6) | 0 | 0 | (1,068.6)
Cash distributions paid to noncontrolling interests | 0 | 0 | (8.1) | (8.1)
Cash contributions from noncontrolling interests | 0 | 0 | 5.9 | 5.9
Net cash proceeds from the issuance of common units | 61.5 | 0 | 0 | 61.5
Amortization of fair value of equity-based awards | 31.8 | 0 | 0 | 31.8
Cash flow hedges | 0 | 32.9 | 0 | 32.9
Other | (22.1) | (0.2) | 1.0 | (21.3)
Balance at Jun. 30, 2012 | 12,685.0 | (318.7) | 109.8 | 12,476.1
Balance at Dec. 31, 2012 | 13,558.1 | (370.4) | 108.3 | 13,296.0
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |
Net income | 1,306.0 | 0 | 2.6 | 1,308.6
Cash distributions paid to limited partners | (1,171.9) | 0 | 0 | (1,171.9)
Cash distributions paid to noncontrolling interests | 0 | 0 | (4.7) | (4.7)
Cash contributions from noncontrolling interests | 0 | 0 | 95.9 | 95.9
Net cash proceeds from the issuance of common units | 835.4 | 0 | 0 | 835.4
Amortization of fair value of equity-based awards | 35.6 | 0 | 0 | 35.6
Cash flow hedges | 0 | 7.0 | 0 | 7.0
Other | (44.3) | 0.4 | (5.2) | (49.1)
Balance at Jun. 30, 2013 | $ 14,518.9 | $ (363.0) | $ 196.9 | $ 14,352.8

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- Definition Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Total distributions to each class of partners (i.e., general, limited and preferred partners). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 + Details
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- Definition Amount of partners' capital (deficit), including portions attributable to both the parent and noncontrolling interests. Excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
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