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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES      
Net income $ 994 $ 514 $ 580
Reconciliation of net income to net cash provided by operating activities:      
Depreciation and amortization 249 256 236
Equity compensation expense 110 98 68
Gain on sale of linefill and base gas (21) (21) (4)
Deferred income tax (benefit)/expense 7   (9)
Equity earnings in unconsolidated entities, net of distributions 10 6 (8)
Net cash received/(paid) for terminated interest rate or foreign currency hedging instruments 12   (9)
Net gain on purchase of remaining 50% interest in PNGS     (9)
Other 2 11 (19)
Changes in assets and liabilities, net of acquisitions:      
Trade accounts receivable and other 83 (59) (744)
Inventory 518 (336) (319)
Accounts payable and other current liabilities 401 (210) 602
Net cash provided by operating activities 2,365 259 365
CASH FLOWS FROM INVESTING ACTIVITIES      
Cash paid in connection with acquisitions, net of cash acquired (Note 3) (1,390) (407) (219)
Change in restricted cash 20 (20)  
Additions to property, equipment and other (635) (451) (460)
Investment in unconsolidated entities     (4)
Net cash received/(paid) for sales and purchases of linefill and base gas (22) 25 (9)
Proceeds from sales of assets and other investing activities 7 2 6
Net cash used in investing activities (2,020) (851) (686)
CASH FLOWS FROM FINANCING ACTIVITIES      
Net borrowings/(repayments) on PAA's revolving credit facility (793) 49 (19)
Net borrowings/(repayments) on PAA's hedged inventory facility (425) 200 20
Net borrowings on PNG's credit agreements 62 260  
Repayment of PNGS debt     (446)
Proceeds from the issuance of senior notes 597 400 1,346
Repayments of senior notes (200) (175) (430)
Net proceeds from the issuance of common units (Note 5) 889 296 458
Cash received for sale of noncontrolling interest in a subsidiary 370 268 26
Distributions paid to common unitholders (Note 5) (575) (512) (468)
Distributions paid to general partner (Note 5) (216) (170) (137)
Distributions to noncontrolling interests (40) (10) (2)
Other financing activities (14) (2) (10)
Net cash provided by/(used in) financing activities (345) 604 338
Effect of translation adjustment on cash (10) (1) (3)
Net increase/(decrease) in cash and cash equivalents (10) 11 14
Cash and cash equivalents, beginning of period 36 25 11
Cash and cash equivalents, end of period 26 36 25
Cash paid for interest, net of amounts capitalized 254 253 214
Cash (received)/paid for income taxes, net of amounts refunded $ 11 $ 21 $ (5)