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Related Party Transactions (Details) - USD ($) $ in Millions |  | 1 Months Ended | 12 Months Ended | 22 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2017 | Mar. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Nov. 14, 2016
Related Party Transactions |  |  |  |  |  |
Limited partner interest |  |  |  |  |  | 98.00%
General Partner |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Costs reimbursed to general partner |  |  | $ 489 | $ 514 | $ 648 |
Oxy |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Revenues |  |  | 920 | 655 | 866 |
Purchases and related costs |  |  | (253) | 42 | 41 |
Trade accounts receivable and other receivables | $ 1,075 |  | 1,075 | 789 |  |
Accounts payable | 990 |  | 990 | 836 |  |
Equity Method Investees |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Revenues |  |  | 3 | 14 | 17 |
Trade accounts receivable and other receivables | 26 |  | 26 | 39 |  |
Accounts payable | $ 41 |  | 41 | 35 |  |
Costs related to services utilized |  |  | $ 434 | 209 | $ 164 |
Prepaid tariff costs |  |  |  | $ 14 |  |
Equity Method Investees | Agreement to Transport Crude Oil |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Ownership interest | 50.00% |  | 50.00% |  |  |
Class C Shares | PAGP |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Class C shares of PAGP held by PAA |  |  | 510,925,432 | 491,910,863 |  |
Common Units |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Issuance of units (in units) |  |  | 54,119,893 |  | 22,133,904 |
Omnibus Agreement |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Expenses paid on behalf of affiliates |  |  | $ 4 | $ 4 |  |
AAP |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Limited partner interest |  |  | 36.00% |  |  |
AAP | PAGP |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Limited partner interest |  |  | 55.00% |  |  |
AAP | Oxy |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Limited partner interest | 11.00% |  |  |  |  |
Continuous Offering Program | Common Units |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Issuance of units (in units) |  |  | 4,033,567 | 26,278,288 | 1,133,904 |
Continuous Offering Program | Omnibus Agreement | Common Units | AAP |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Issuance of units (in units) |  |  | 1,800,000 |  |  |
Underwritten Offering | Common Units |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Issuance of units (in units) |  |  |  |  | 21,000,000 |
Underwritten Offering | Omnibus Agreement | Common Units | AAP |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Issuance of units (in units) |  | 48,300,000 | 48,300,000 |  |  |

X
- Definition Expenses, other than income taxes, paid on behalf of an affiliate pursuant to an agreement(including, but not limited to, expenses associated with (i) compensation for directors, director and officer liability insurance, (iii) listing exchange fees, (iv) investor relations expenses and (v) expenses related to legal, tax, financial advisory and accounting services). + References No definition available. + Details
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