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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Millions, unless otherwise specified
 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES    
Net income $ 797 $ 706
Reconciliation of net income to net cash provided by operating activities:    
Depreciation and amortization (Note 15) 356 191
Inventory valuation adjustments 128 3
Equity compensation expense 82 56
Gain on sales of linefill and base gas (17) (19)
Net cash received/(paid) for terminated interest rate and foreign currency hedging instruments (23) 12
Loss on foreign currency revaluation 2 12
Other 8 6
Changes in assets and liabilities, net of acquisitions (453) 785
Net cash provided by operating activities 880 1,752
CASH FLOWS FROM INVESTING ACTIVITIES    
Cash paid in connection with acquisitions, net of cash acquired (1,537) (758)
Change in restricted cash   20
Additions to property, equipment and other (852) (449)
Proceeds from sales of assets 21 10
Net cash paid for sales and purchases of linefill and base gas (39) (3)
Investment in unconsolidated entities (24)  
Cash received upon formation of equity-method investment 55  
Other investing activities   (5)
Net cash used in investing activities (2,376) (1,185)
CASH FLOWS FROM FINANCING ACTIVITIES    
Net borrowings/(repayments) on PAA's revolving credit facility 26 (778)
Net borrowings/(repayments) on PAA's hedged inventory facility 619 (450)
Net borrowings/(repayments) on PNG's credit agreements 54 (7)
Proceeds from the issuance of senior notes 1,247 597
Repayments of senior notes (500) (200)
Net proceeds from the issuance of common units (Note 9) 812 503
Cash received for sale of noncontrolling interest in a subsidiary   370
Distributions paid to common unitholders (Note 9) (502) (427)
Distributions paid to general partner (Note 9) (208) (157)
Distributions paid to noncontrolling interests (36) (28)
Other financing activities (11) (5)
Net cash provided by/(Used in) financing activities 1,501 (582)
Effect of translation adjustment on cash 1 (7)
Net increase/(decrease) in cash and cash equivalents 6 (22)
Cash and cash equivalents, beginning of period 26 36
Cash and cash equivalents, end of period 32 14
Cash paid for:    
Interest, net of amounts capitalized 207 204
Income taxes, net of amounts refunded $ 58 $ 1