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Schedule ll
12 Months Ended
Dec. 31, 2012
Valuation and Qualifying Accounts [Abstract]  
VALUATION AND QUALIFYING ACCOUNTS
SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS (Consolidated)
            
ConocoPhillips       
  Millions of Dollars
   Balance at Charged to     Balance at
Description January 1 Expense Other(a)Deductions December 31
2012          
Deducted from asset accounts:          
 Allowance for doubtful accounts and notes receivable$ 30  (4)  (13)  (3)(b) 10
 Deferred tax asset valuation allowance  1,487  369  (447)  (64)  1,345
Included in other liabilities:          
 Restructuring accruals  48  9  (5)  (35)  17
2011          
Deducted from asset accounts:          
 Allowance for doubtful accounts and notes receivable$ 32  2  -  (4)(b) 30
 Deferred tax asset valuation allowance  1,400  174  (31)  (56)  1,487
Included in other liabilities:          
 Restructuring accruals  105  25  (1)  (81)(c) 48
2010          
Deducted from asset accounts:          
 Allowance for doubtful accounts and notes receivable$ 76  (31)  (1)  (12)(b) 32
 Deferred tax asset valuation allowance  1,540  414  (12)  (542)  1,400
Included in other liabilities:          
 Restructuring accruals  73  78  1  (47)(c) 105
(a)Represents acquisitions/dispositions/revisions and the effect of translating foreign financial statements.
(b)Amounts charged off less recoveries of amounts previously charged off.
(c)Benefit payments.