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Debt And Related Expenses (Schedule Of Debt Instruments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Debt Instrument [Line Items]
Commercial paper	$ 932us-gaap_CommercialPaper		$ 1,317us-gaap_CommercialPaper
Net discount on debentures and notes	(18)us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet		(20)us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
Total debt	11,262us-gaap_DebtLongtermAndShorttermCombinedAmount		12,022us-gaap_DebtLongtermAndShorttermCombinedAmount
Less amount classified as short-term debt	1,432us-gaap_DebtCurrent	[1]	4,066us-gaap_DebtCurrent	[1]
Long-term debt	9,830us-gaap_LongTermDebtNoncurrent		7,956us-gaap_LongTermDebtNoncurrent
5.625% due January 15, 2014 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	5.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FivePointSixTwoFivePercentDueOnJanuaryFifteenthTwoThousandAndFourteenMember		5.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FivePointSixTwoFivePercentDueOnJanuaryFifteenthTwoThousandAndFourteenMember
Debt, maturity date	Jan. 15, 2014		Jan. 15, 2014
Short-term debt			500us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = dvn_FivePointSixTwoFivePercentDueOnJanuaryFifteenthTwoThousandAndFourteenMember
Floating Rate due December 15, 2015 [Member]
Debt Instrument [Line Items]
Debt, maturity date	Dec. 15, 2015		Dec. 15, 2015
Short-term debt	500us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = dvn_FloatingRateDueDecemberFifteenthTwoThousandFifteenMember		500us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = dvn_FloatingRateDueDecemberFifteenthTwoThousandFifteenMember
2.40% due July 15, 2016 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	2.40%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointFourZeroPercentDueJulyFifteenthTwoThousandAndSixteenMember		2.40%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointFourZeroPercentDueJulyFifteenthTwoThousandAndSixteenMember
Debt, maturity date	Jul. 15, 2016		Jul. 15, 2016
Long term debt, gross			500us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_TwoPointFourZeroPercentDueJulyFifteenthTwoThousandAndSixteenMember
Floating Rate Due December 15, 2016 [Member]
Debt Instrument [Line Items]
Debt, maturity date	Dec. 15, 2016		Dec. 15, 2016
Short-term debt			350us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = dvn_FloatingRateDueDecemberFifteenthTwoThousandSixteenMember
Long term debt, gross	350us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_FloatingRateDueDecemberFifteenthTwoThousandSixteenMember
1.20% Due December 15, 2016 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	1.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember		1.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember
Debt, maturity date	Dec. 15, 2016		Dec. 15, 2016
Short-term debt			650us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember
1.875% due May 15, 2017 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	1.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_OnePointEightSevenFivePercentDueMayFifteenthTwoThousandSeventeenMember		1.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_OnePointEightSevenFivePercentDueMayFifteenthTwoThousandSeventeenMember
Debt, maturity date	May 15, 2017		May 15, 2017
Long term debt, gross			750us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_OnePointEightSevenFivePercentDueMayFifteenthTwoThousandSeventeenMember
8.25% Due July 1, 2018 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	8.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_EightPointTwoFivePercentDueJulyFirstTwoThousandAndEighteenMember		8.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_EightPointTwoFivePercentDueJulyFirstTwoThousandAndEighteenMember
Debt, maturity date	Jul. 01, 2018		Jul. 01, 2018
Long term debt, gross	125us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_EightPointTwoFivePercentDueJulyFirstTwoThousandAndEighteenMember		125us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_EightPointTwoFivePercentDueJulyFirstTwoThousandAndEighteenMember
2.25% Due December 15, 2018 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember		2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember
Debt, maturity date	Dec. 15, 2018		Dec. 15, 2018
Short-term debt			750us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember
Long term debt, gross	750us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember
6.30% Due January 15, 2019 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	6.30%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SixPointThreeZeroPercentDueJanuaryFifteenthTwoThousandAndNineteenMember		6.30%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SixPointThreeZeroPercentDueJanuaryFifteenthTwoThousandAndNineteenMember
Debt, maturity date	Jan. 15, 2019		Jan. 15, 2019
Long term debt, gross	700us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_SixPointThreeZeroPercentDueJanuaryFifteenthTwoThousandAndNineteenMember		700us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_SixPointThreeZeroPercentDueJanuaryFifteenthTwoThousandAndNineteenMember
4.00% Due July 15, 2021 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FourPointZeroZeroPercentDueJulyFifteenthTwoThousandAndTwentyOneMember		4.00%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FourPointZeroZeroPercentDueJulyFifteenthTwoThousandAndTwentyOneMember
Debt, maturity date	Jul. 15, 2021		Jul. 15, 2021
Long term debt, gross	500us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_FourPointZeroZeroPercentDueJulyFifteenthTwoThousandAndTwentyOneMember		500us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_FourPointZeroZeroPercentDueJulyFifteenthTwoThousandAndTwentyOneMember
3.25% due May 15, 2022 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	3.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_ThreePointTwoFivePercentDueMayFifteenthTwoThousandTwentyTwoMember		3.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_ThreePointTwoFivePercentDueMayFifteenthTwoThousandTwentyTwoMember
Debt, maturity date	May 15, 2022		May 15, 2022
Long term debt, gross	1,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_ThreePointTwoFivePercentDueMayFifteenthTwoThousandTwentyTwoMember		1,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_ThreePointTwoFivePercentDueMayFifteenthTwoThousandTwentyTwoMember
7.50% due September 15, 2027 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SevenPointFiveZeroPercentDueSeptemberFifteenthTwoThousandAndTwentySevenMember		7.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SevenPointFiveZeroPercentDueSeptemberFifteenthTwoThousandAndTwentySevenMember
Debt, maturity date	Sep. 15, 2027		Sep. 15, 2027
Long term debt, gross	150us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_SevenPointFiveZeroPercentDueSeptemberFifteenthTwoThousandAndTwentySevenMember		150us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_SevenPointFiveZeroPercentDueSeptemberFifteenthTwoThousandAndTwentySevenMember
7.875% due September 30, 2031 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SevenPointEightSevenFivePercentDueSeptemberThirtiethTwoThousandAndThirtyOneMember		7.875%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SevenPointEightSevenFivePercentDueSeptemberThirtiethTwoThousandAndThirtyOneMember
Debt, maturity date	Sep. 30, 2031		Sep. 30, 2031
Long term debt, gross	1,250us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_SevenPointEightSevenFivePercentDueSeptemberThirtiethTwoThousandAndThirtyOneMember		1,250us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_SevenPointEightSevenFivePercentDueSeptemberThirtiethTwoThousandAndThirtyOneMember
7.95% due April 15, 2032 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	7.95%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SevenPointNineFivePercentDueAprilFifteenthTwoThousandAndThirtyTwoMember		7.95%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SevenPointNineFivePercentDueAprilFifteenthTwoThousandAndThirtyTwoMember
Debt, maturity date	Apr. 15, 2032		Apr. 15, 2032
Long term debt, gross	1,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_SevenPointNineFivePercentDueAprilFifteenthTwoThousandAndThirtyTwoMember		1,000us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_SevenPointNineFivePercentDueAprilFifteenthTwoThousandAndThirtyTwoMember
5.60% due July 15, 2041 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	5.60%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FivePointSixZeroPercentDueJulyFifteenthTwoThousandAndFortyOneMember		5.60%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FivePointSixZeroPercentDueJulyFifteenthTwoThousandAndFortyOneMember
Debt, maturity date	Jul. 15, 2041		Jul. 15, 2041
Long term debt, gross	1,250us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_FivePointSixZeroPercentDueJulyFifteenthTwoThousandAndFortyOneMember		1,250us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_FivePointSixZeroPercentDueJulyFifteenthTwoThousandAndFortyOneMember
4.75% due May 15, 2042 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FourPointSevenFivePercentDueMayFifteenthTwoThousandFortyTwoMember		4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FourPointSevenFivePercentDueMayFifteenthTwoThousandFortyTwoMember
Debt, maturity date	May 15, 2042		May 15, 2042
Long term debt, gross	750us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_FourPointSevenFivePercentDueMayFifteenthTwoThousandFortyTwoMember		750us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_FourPointSevenFivePercentDueMayFifteenthTwoThousandFortyTwoMember
Senior Notes For Acquisition of GeoSouthern [Member]
Debt Instrument [Line Items]
Short-term debt			2,250us-gaap_ShortTermBorrowings / us-gaap_DebtInstrumentAxis = dvn_SeniorNotesForAcquisitionOfGeosouthernMember
Devon Energy Corporation [Member]
Debt Instrument [Line Items]
Total debt	9,239us-gaap_DebtLongtermAndShorttermCombinedAmount / dei_LegalEntityAxis = dvn_DevonEnergyCorporationMember		12,022us-gaap_DebtLongtermAndShorttermCombinedAmount / dei_LegalEntityAxis = dvn_DevonEnergyCorporationMember
GeoSouthern Intermediate Holdings, LLC [Member] | Floating Rate due December 15, 2015 [Member]
Debt Instrument [Line Items]
Debt, maturity date	Dec. 15, 2015
GeoSouthern Intermediate Holdings, LLC [Member] | Floating Rate Due December 15, 2016 [Member]
Debt Instrument [Line Items]
Debt, maturity date	Dec. 15, 2016
GeoSouthern Intermediate Holdings, LLC [Member] | 1.20% Due December 15, 2016 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	1.20%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_OnePointTwoPercentDueDecemberFifteenthTwoThousandSixteenMember
Debt, maturity date	Dec. 15, 2016
GeoSouthern Intermediate Holdings, LLC [Member] | 2.25% Due December 15, 2018 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	2.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_BusinessAcquisitionAxis = dvn_GeosouthernIntermediateHoldingsLlcMember / us-gaap_DebtInstrumentAxis = dvn_TwoPointTwoFivePercentDueDecemberFifteenthTwoThousandEighteenMember
Debt, maturity date	Dec. 15, 2018
EnLink [Member]
Debt Instrument [Line Items]
Long term debt, gross	2,023us-gaap_DebtInstrumentCarryingAmount / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
Net premium on debentures and notes	23us-gaap_DebtInstrumentUnamortizedPremium / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
EnLink [Member] | Credit Facilities [Member]
Debt Instrument [Line Items]
Long term debt, gross	237us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_CreditFacilitiesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
EnLink [Member] | 2.70% due April 1, 2019 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	2.70%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_TwoPointSevenPercentDueAprilFirstTwoThousandAndNinteenMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
Debt, maturity date	Apr. 01, 2019
Long term debt, gross	400us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_TwoPointSevenPercentDueAprilFirstTwoThousandAndNinteenMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
EnLink [Member] | 7.125% due June 1, 2022 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	7.125%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_SevenPointOneTwoFivePercentDueJuneFirstTwoThousandAndTwentyTwoMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
Debt, maturity date	Jun. 01, 2022
Long term debt, gross	163us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_SevenPointOneTwoFivePercentDueJuneFirstTwoThousandAndTwentyTwoMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
EnLink [Member] | 4.40% due April 1, 2024 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	4.40%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FourPointFourZeroPercentDueAprilOneTwoThousandTwentyFourMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
Debt, maturity date	Apr. 01, 2024
Long term debt, gross	550us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_FourPointFourZeroPercentDueAprilOneTwoThousandTwentyFourMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
EnLink [Member] | 5.60% due April 1, 2044 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	5.60%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FivePointSixZeroPercentDueAprilOneTwoThousandAndFortyFourMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
Debt, maturity date	Apr. 01, 2044
Long term debt, gross	350us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_FivePointSixZeroPercentDueAprilOneTwoThousandAndFortyFourMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
EnLink [Member] | 5.05% due April 1, 2045 [Member]
Debt Instrument [Line Items]
Debt interest rate, stated percentage	5.05%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = dvn_FivePointZeroFivePercentDueAprilOneTwoThousandAndFortyFiveMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
Debt, maturity date	Apr. 01, 2045
Long term debt, gross	$ 300us-gaap_DebtInstrumentCarryingAmount / us-gaap_DebtInstrumentAxis = dvn_FivePointZeroFivePercentDueAprilOneTwoThousandAndFortyFiveMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = dvn_EnlinkMember
[1] 2014 short-term debt consists of $932 million of commercial paper and $500 million floating rate due on December 15, 2015. 2013 short-term debt consists of $2.25 billion of senior notes issued in conjunction with the GeoSouthern acquisition, $1.3 billion of commercial paper and $500 million of senior notes due January 15, 2014.

X

- Definition

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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No definition available.

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