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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2011
Dec. 31, 2010
CURRENT ASSETS    
Cash and cash equivalents $ 23 $ 36
Restricted cash   20
Trade accounts receivable and other receivables, net 3,047 2,746
Inventory 1,452 1,491
Other current assets 111 88
Total current assets 4,633 4,381
PROPERTY AND EQUIPMENT 8,498 7,814
Accumulated depreciation (1,222) (1,123)
Property and equipment, net 7,276 6,691
OTHER ASSETS    
Goodwill 1,692 1,376
Linefill and base gas 549 519
Long-term inventory 136 154
Investments in unconsolidated entities 195 200
Other, net 432 382
Total assets 14,913 13,703
CURRENT LIABILITIES    
Accounts payable and accrued liabilities 3,265 2,738
Short-term debt 536 1,326
Other current liabilities 182 151
Total current liabilities 3,983 4,215
LONG-TERM LIABILITIES    
Senior notes, net of unamortized discount of $14 and $12, respectively 4,761 4,363
Long-term debt under credit facilities and other 234 268
Other long-term liabilities and deferred credits 252 284
Total long-term liabilities 5,247 4,915
COMMITMENTS AND CONTINGENCIES (NOTE 13)    
PARTNERS' CAPITAL    
Common unitholders (149,357,119 and 141,199,175 units outstanding, respectively) 5,022 4,234
General partner 128 108
Total partners' capital excluding noncontrolling interests 5,150 4,342
Noncontrolling interests 533 231
Total partners' capital 5,683 4,573
Total liabilities and partners' capital $ 14,913 $ 13,703