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Operating Segments (Details 2) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Reconciliation of segment profit to net income attributable to Plains |  |  |  |
Segment profit | $ 557 | $ 365 | $ 938 | $ 714
Depreciation and amortization | (86) | (63) | (146) | (126)
Interest expense | (75) | (62) | (140) | (128)
Other income/(expense), net |  | 2 | 2 | (20)
Income tax expense | (10) | (9) | (30) | (22)
NET INCOME | 386 | 233 | 624 | 418
Net income attributable to noncontrolling interests | (8) | (8) | (15) | (10)
NET INCOME ATTRIBUTABLE TO PLAINS | $ 378 | $ 225 | $ 609 | $ 408

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