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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 | 651.3 | 0 | 4.2 | 655.5
Cash distributions paid to limited partners | (530.4) | 0 | 0 | (530.4)
Cash distributions paid to noncontrolling interests | 0 | 0 | (6.6) | (6.6)
Cash contributions from noncontrolling interests | 0 | 0 | 4.9 | 4.9
Net cash proceeds from issuance of common units | 32.8 | 0 | 0 | 32.8
Amortization of fair value of equity-based awards | 15.6 | 0 | 0 | 15.6
Cash flow hedges | 0 | (6.0) | 0 | (6.0)
Change in fair value of available-for-sale equity securities | 0 | 15.8 | 0 | 15.8
Other | (13.5) | (0.2) | 1.1 | (12.6)
Balance at Mar. 31, 2012 | 12,620.6 | (341.8) | 109.5 | 12,388.3
Balance at Dec. 31, 2012 | 13,558.1 | (370.4) | 108.3 | 13,296.0
Increase (Decrease) in Partners' Capital [Roll Forward] |  |  |  |
Net income | 753.5 | 0 | 1.8 | 755.3
Cash distributions paid to limited partners | (577.6) | 0 | 0 | (577.6)
Cash distributions paid to noncontrolling interests | 0 | 0 | (2.4) | (2.4)
Net cash proceeds from issuance of common units | 554.1 | 0 | 0 | 554.1
Amortization of fair value of equity-based awards | 17.1 | 0 | 0 | 17.1
Cash flow hedges | 0 | (27.7) | 0 | (27.7)
Change in fair value of available-for-sale equity securities |  |  |  | 0
Other | (24.6) | 0 | 0 | (24.6)
Balance at Mar. 31, 2013 | $ 14,280.6 | $ (398.1) | $ 107.7 | $ 13,990.2

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