XML 13 R39.htm IDEA: XBRL DOCUMENT v3.19.3

Commitments (Details) $ in Millions	Sep. 30, 2019 USD ($)
Drilling Rig and Completion Service Contracts Commitments [Member]
Commitments and Contingencies [Line Items]
Contractual obligation	$ 57.1
Early termination penalties for rig contracts	38.1
Electricity Purchase Agreement [Member]
Commitments and Contingencies [Line Items]
Contractual obligation	55.1
Minimum [Member] | Sand Sourcing Commitment [Member]
Commitments and Contingencies [Line Items]
Potential penalty for not meeting minimum sand sourcing requirements	0.0
Minimum [Member] | Completion Service Commitment [Member]
Commitments and Contingencies [Line Items]
Potential penalty for not meeting minimum completion service arrangement requirements	0.0
Maximum [Member] | Sand Sourcing Commitment [Member]
Commitments and Contingencies [Line Items]
Potential penalty for not meeting minimum sand sourcing requirements	10.0
Maximum [Member] | Completion Service Commitment [Member]
Commitments and Contingencies [Line Items]
Potential penalty for not meeting minimum completion service arrangement requirements	$ 14.3

X

- Definition

Early Termination Penalty for Rig Contract Cancellation

+ References

No definition available.

+ Details

Name:	sm_EarlyTerminationPenaltyforRigContractCancellation
Namespace Prefix:	sm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Potential Penalty for not Meeting Minimum Completion Service Arrangement Requirements

+ References

No definition available.

+ Details

Name:	sm_PotentialPenaltyfornotMeetingMinimumCompletionServiceArrangementRequirements
Namespace Prefix:	sm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Potential Penalty for not Meeting Minimum Sand Sourcing Requirements

+ References

No definition available.

+ Details

Name:	sm_PotentialPenaltyfornotMeetingMinimumSandSourcingRequirements
Namespace Prefix:	sm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

+ References

No definition available.

+ Details

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=sm_DrillingRigLeasingContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=sm_ElectricityPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=sm_SandSourcingCommitmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=sm_CompletionServiceCommitmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: