XML 81 R72.htm IDEA: XBRL DOCUMENT v2.4.1.9
Debt and Interest Expense - Outstanding Debt Table (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Debt Instrument [Line Items]      
Total debt at face value $ 16,687,000,000us-gaap_DebtInstrumentCarryingAmount $ 15,202,000,000us-gaap_DebtInstrumentCarryingAmount  
Net unamortized discounts and premiums (1) (1,616,000,000)us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet [1] (1,645,000,000)us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet [1]  
Total borrowings 15,071,000,000us-gaap_LongTermDebt 13,557,000,000us-gaap_LongTermDebt 13,269,000,000us-gaap_LongTermDebt
Capital lease obligation 21,000,000us-gaap_CapitalLeaseObligations 8,000,000us-gaap_CapitalLeaseObligations  
Current portion of long-term debt 0us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent 500,000,000us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent  
Total long-term debt 15,092,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations 13,065,000,000us-gaap_LongTermDebtAndCapitalLeaseObligations  
WES RCF [Member] | Western Gas Partners, LP [Member] | Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Line of credit, outstanding borrowings 510,000,000us-gaap_LineOfCredit
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= apc_RevolvingCreditFacility2Member
0us-gaap_LineOfCredit
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= apc_RevolvingCreditFacility2Member
 
Senior Notes [Member] | 5.750% Senior Notes due 2014 [Member]      
Debt Instrument [Line Items]      
Principal 0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes1Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
275,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes1Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes1Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Jun. 15, 2014    
Senior Notes [Member] | 7.625% Senior Notes due 2014 [Member]      
Debt Instrument [Line Items]      
Principal 0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.625%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Mar. 15, 2014    
Senior Notes [Member] | 5.950% Senior Notes due 2016 [Member]      
Debt Instrument [Line Items]      
Principal 1,750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes3Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
1,750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes3Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 5.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes3Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Sep. 15, 2016    
Senior Notes [Member] | 6.375% Senior Notes due 2017 [Member]      
Debt Instrument [Line Items]      
Principal 2,000,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes4Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
2,000,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes4Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 6.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes4Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Sep. 15, 2017    
Senior Notes [Member] | 7.050% Debentures due 2018 [Member]      
Debt Instrument [Line Items]      
Principal 114,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures1Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
114,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures1Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.05%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures1Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date May 15, 2018    
Senior Notes [Member] | WES 2.600% Senior Notes due 2018 [Member] | Western Gas Partners, LP [Member]      
Debt Instrument [Line Items]      
Principal 350,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes5Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
250,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes5Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 2.60%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes5Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
2.60%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes5Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, maturity date Aug. 15, 2018 Aug. 15, 2018  
Senior Notes [Member] | 6.950% Senior Notes due 2019 [Member]      
Debt Instrument [Line Items]      
Principal 300,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes6Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
300,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes6Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 6.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes6Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Jun. 15, 2019    
Senior Notes [Member] | 8.700% Senior Notes due 2019 [Member]      
Debt Instrument [Line Items]      
Principal 600,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes7Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
600,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes7Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 8.70%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes7Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Mar. 15, 2019    
Senior Notes [Member] | WES 5.375% Senior Notes due 2021 [Member] | Western Gas Partners, LP [Member]      
Debt Instrument [Line Items]      
Principal 500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes8Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes8Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 5.375%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes8Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Jun. 01, 2021    
Senior Notes [Member] | WES 4.000% Senior Notes due 2022 [Member] | Western Gas Partners, LP [Member]      
Debt Instrument [Line Items]      
Principal 670,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes9Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
670,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes9Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes9Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Jun. 01, 2022    
Senior Notes [Member] | 3.450% Senior Notes due 2024 [Member]      
Debt Instrument [Line Items]      
Principal 625,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes16Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes16Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 3.45%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes16Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Jul. 15, 2024    
Senior Notes [Member] | 6.950% Senior Notes due 2024 [Member]      
Debt Instrument [Line Items]      
Principal 650,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes10Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
650,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes10Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 6.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes10Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Jun. 01, 2024    
Senior Notes [Member] | 7.500% Debentures due 2026 [Member]      
Debt Instrument [Line Items]      
Principal 112,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
112,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Oct. 15, 2026    
Senior Notes [Member] | 7.000% Debentures due 2027 [Member]      
Debt Instrument [Line Items]      
Principal 54,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures3Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
54,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures3Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures3Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Nov. 15, 2027    
Senior Notes [Member] | 7.125% Debentures due 2027 [Member]      
Debt Instrument [Line Items]      
Principal 150,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures4Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
150,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures4Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.125%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures4Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Oct. 15, 2027    
Senior Notes [Member] | 6.625% Debentures due 2028 [Member]      
Debt Instrument [Line Items]      
Principal 17,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures5Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
17,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures5Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 6.625%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures5Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Jan. 15, 2028    
Senior Notes [Member] | 7.150% Debentures due 2028 [Member]      
Debt Instrument [Line Items]      
Principal 235,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures6Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
235,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures6Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.15%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures6Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date May 15, 2028    
Senior Notes [Member] | 7.200% Debentures due 2029 [Member]      
Debt Instrument [Line Items]      
Principal 135,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures7Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
135,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures7Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.20%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures7Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Mar. 15, 2029    
Senior Notes [Member] | 7.950% Debentures due 2029 [Member]      
Debt Instrument [Line Items]      
Principal 117,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures8Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
117,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures8Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures8Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Apr. 15, 2029    
Senior Notes [Member] | 7.500% Senior Notes due 2031 [Member]      
Debt Instrument [Line Items]      
Principal 900,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes11Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
900,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes11Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes11Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date May 01, 2031    
Senior Notes [Member] | 7.875% Senior Notes due 2031 [Member]      
Debt Instrument [Line Items]      
Principal 500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes12Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes12Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes12Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Sep. 15, 2031    
Senior Notes [Member] | Zero-Coupon Senior Notes due 2036 [Member]      
Debt Instrument [Line Items]      
Principal 2,360,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotesZeroCouponMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
2,360,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotesZeroCouponMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, maturity date Oct. 10, 2036    
Total borrowings 765,000,000us-gaap_LongTermDebt
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotesZeroCouponMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Senior Notes [Member] | 6.450% Senior Notes due 2036 [Member]      
Debt Instrument [Line Items]      
Principal 1,750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes13Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
1,750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes13Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 6.45%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes13Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Sep. 15, 2036    
Senior Notes [Member] | 7.950% Senior Notes due 2039 [Member]      
Debt Instrument [Line Items]      
Principal 325,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes14Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
325,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes14Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.95%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes14Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Jun. 15, 2039    
Senior Notes [Member] | 6.200% Senior Notes due 2040 [Member]      
Debt Instrument [Line Items]      
Principal 750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes15Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
750,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes15Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 6.20%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes15Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Mar. 15, 2040    
Senior Notes [Member] | 4.500% Senior Notes due 2044 [Member]      
Debt Instrument [Line Items]      
Principal 625,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes17Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes17Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 4.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes17Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Jul. 15, 2044    
Senior Notes [Member] | WES 5.450% Senior Notes due 2044 [Member] | Western Gas Partners, LP [Member]      
Debt Instrument [Line Items]      
Principal 400,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes18Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
0us-gaap_DebtInstrumentFaceAmount
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes18Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 5.45%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_AccountsNotesLoansAndFinancingReceivablesByLegalEntityOfCounterpartyTypeAxis
= us-gaap_PartnershipMember
/ us-gaap_DebtInstrumentAxis
= apc_SeniorNotes18Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Apr. 01, 2044    
Senior Notes [Member] | 7.730% Debentures due 2096 [Member]      
Debt Instrument [Line Items]      
Principal 61,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures9Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
61,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures9Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.73%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures9Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Sep. 15, 2096    
Senior Notes [Member] | 7.500% Debentures due 2096 [Member]      
Debt Instrument [Line Items]      
Principal 78,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures10Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
78,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures10Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures10Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Nov. 01, 2096    
Senior Notes [Member] | 7.250% Debentures due 2096 [Member]      
Debt Instrument [Line Items]      
Principal $ 49,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures11Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
$ 49,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= apc_Debentures11Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
 
Debt instrument, stated interest rate 7.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= apc_Debentures11Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember
   
Debt instrument, maturity date Nov. 15, 2096    
[1] Unamortized discounts and premiums are amortized over the term of the related debt.