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Operating Segments (Details 2) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Reconciliation of segment profit to net income attributable to PAA        
Segment profit $ 488 $ 485 $ 1,097 $ 1,233
Depreciation and amortization (100) (91) (196) (173)
Interest expense, net (82) (75) (161) (152)
Other income/(expense), net 4 (1) 2 (1)
INCOME BEFORE TAX 310 318 742 907
Income tax expense (22) (18) (70) (70)
NET INCOME 288 300 672 837
Net income attributable to noncontrolling interests (1) (8) (1) (16)
NET INCOME ATTRIBUTABLE TO PAA $ 287 $ 292 $ 671 $ 821