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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL / MEMBERS' EQUITY (USD $) In Millions, except Share data, unless otherwise specified | Total USD ($) | Class A Shares | Class B Shares | Partners' Capital (Excluding Noncontrolling Interests) Class A Shares USD ($) | Partners' Capital (Excluding Noncontrolling Interests) Class B Shares | Noncontrolling Interests USD ($) | Members' Equity (Excluding Noncontrolling Interests) USD ($)
--- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of period at Dec. 31, 2012 | $ 6,968 |  |  |  |  | $ 6,968 |
Increase (Decrease) in Partners' Capital |  |  |  |  |  |  |
Net income | 1,070 |  |  |  |  | 1,067 | 3
Distributions | (1,188) |  |  |  |  | (1,182) | (6)
Issuance of common units by subsidiaries | 431 |  |  |  |  | 431 |
Contributions from noncontrolling interests related to the issuance of common units by subsidiaries | 9 |  |  |  |  | 9 |
Issuance of PAA common units under LTIP, net of units tendered by employees to satisfy tax withholding obligations | (11) |  |  |  |  | (11) |
Equity-indexed compensation expense | 31 |  |  |  |  | 31 |
Distribution equivalent right payments | (4) |  |  |  |  | (4) |
Other comprehensive loss | (98) |  |  |  |  | (98) |
Other | (2) |  |  |  |  | (2) |
Balance, end of period at Sep. 30, 2013 | 7,206 |  |  |  |  | 7,209 | (3)
Balance, beginning of period at Dec. 31, 2013 | 8,279 |  |  | 1,035 |  | 7,244 |
Balance, beginning of period (in shares) at Dec. 31, 2013 |  | 133,833,637 | 472,196,136 | 133,800,000 | 472,200,000 |  |
Increase (Decrease) in Partners' Capital |  |  |  |  |  |  |
Net income | 958 |  |  | 45 |  | 913 |
Distributions | (1,024) |  |  | (65) |  | (959) |
Transfer of ownership interest in connection with AAP unit exchanges (Note 8) |  |  |  | (1) |  | 1 |
Transfer of ownership interest in connection with AAP unit exchanges (Note 8) (in shares) |  | 2,213,000 |  | 2,200,000 |  |  |
Transfer of ownership interest in connection with AAP unit exchanges (Note 8) (in shares) |  |  | (2,213,000) |  | (2,200,000) |  |
Deferred tax asset | 23 |  |  | 23 |  |  |
Issuance of common units by subsidiaries | 655 |  |  |  |  | 655 |
Issuance of PAA common units under LTIP, net of units tendered by employees to satisfy tax withholding obligations | (18) |  |  |  |  | (18) |
Equity-indexed compensation expense | 31 |  |  | 1 |  | 30 |
Distribution equivalent right payments | (5) |  |  |  |  | (5) |
Other comprehensive loss | (211) |  |  | (1) |  | (210) |
Other | (1) |  |  |  |  | (1) |
Balance, end of period at Sep. 30, 2014 | $ 8,687 |  |  | $ 1,037 |  | $ 7,650 |
Balance, end of period (in shares) at Sep. 30, 2014 |  | 136,046,637 | 469,983,136 | 136,000,000 | 470,000,000 |  |

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