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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Millions, unless otherwise specified
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 624 $ 418
Reconciliation of net income to net cash provided by operating activities:    
Depreciation and amortization 146 126
Inventory valuation adjustments 121 2
Equity compensation expense 60 46
Gain on sales of linefill and base gas (16) (15)
Net cash received/(paid) for terminated interest rate and foreign currency hedging instruments (23) 12
(Gain)/loss on foreign currency revaluation 12 (5)
Other 4 8
Changes in assets and liabilities, net of acquisitions (580) 380
Net cash provided by operating activities 348 972
CASH FLOWS FROM INVESTING ACTIVITIES    
Cash paid in connection with acquisitions, net of cash acquired (1,534) (751)
Change in restricted cash   20
Additions to property, equipment and other (544) (287)
Proceeds from sales of assets 19 1
Net cash received/(paid) for sales and purchases of linefill and base gas 20 (6)
Other investing activities 1 (4)
Net cash used in investing activities (2,038) (1,027)
CASH FLOWS FROM FINANCING ACTIVITIES    
Net borrowings/(repayments) on PAA's revolving credit facility 168 (592)
Net borrowings/(repayments) on PAA's hedged inventory facility 140 (200)
Net borrowings/(repayments) on PNG's credit agreements 37 (34)
Proceeds from the issuance of senior notes 1,247 597
Repayments of senior notes   (200)
Net proceeds from the issuance of common units (Note 9) 535 503
Cash received for sale of noncontrolling interest in a subsidiary   370
Short-term borrowings related to cash overdraft 48  
Distributions paid to common unitholders (Note 9) (328) (280)
Distributions paid to general partner (Note 9) (135) (102)
Distributions to noncontrolling interests (24) (16)
Other financing activities (10) (3)
Net cash provided by financing activities 1,678 43
Effect of translation adjustment on cash (2) (1)
Net decrease in cash and cash equivalents (14) (13)
Cash and cash equivalents, beginning of period 26 36
Cash and cash equivalents, end of period 12 23
Cash paid for interest, net of amounts capitalized 129 123
Cash paid for income taxes, net of amounts refunded $ 48 $ 1