Taxonomy Viewer

Name	AssetRetirementObligationsPolicy
Namespace	http://fasb.org/us-gaap/2020-01-31
Prefix	us-gaap
Data type	nonnum:textBlockItemType
Period type	duration
Substitution Group	xbrli:item
Balance	None
Nillable	True
Abstract	False

Text	Lang	Role	Container role
Asset Retirement Obligation [Policy Text Block]	en-US	http://www.xbrl.org/2003/role/label	http://www.xbrl.org/2003/role/link
Disclosure of accounting policy for legal obligation associated with retirement of long-lived asset that results from acquisition, construction, or development or from normal operation of long-lived asset. Excludes environmental remediation liability from improper or other-than-normal operation of long-lived asset, obligation arising in connection with leased property that meets definition of lease payments or variable lease payments and from plan to sell or otherwise dispose of a long-lived asset.	en-US	http://www.xbrl.org/2003/role/documentation	http://www.xbrl.org/2003/role/link

Name	Value	Role
Publisher	FASB	http://fasb.org/us-gaap/role/ref/legacyRef
Name	Accounting Standards Codification	http://fasb.org/us-gaap/role/ref/legacyRef
Topic	410	http://fasb.org/us-gaap/role/ref/legacyRef
SubTopic	20	http://fasb.org/us-gaap/role/ref/legacyRef
Section	50	http://fasb.org/us-gaap/role/ref/legacyRef
Paragraph	1	http://fasb.org/us-gaap/role/ref/legacyRef
URI	http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849	http://fasb.org/us-gaap/role/ref/legacyRef
Publisher	FASB	http://fasb.org/us-gaap/role/ref/legacyRef
Name	Accounting Standards Codification	http://fasb.org/us-gaap/role/ref/legacyRef
Topic	235	http://fasb.org/us-gaap/role/ref/legacyRef
SubTopic	10	http://fasb.org/us-gaap/role/ref/legacyRef
Section	50	http://fasb.org/us-gaap/role/ref/legacyRef
Paragraph	3	http://fasb.org/us-gaap/role/ref/legacyRef
URI	http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790	http://fasb.org/us-gaap/role/ref/legacyRef

	Name	Relation Type	Role
	Policy Text Block [Abstract] `us-gaap:PolicyTextBlockAbstract`	parent-child	http://fasb.org/us-gaap/role/disclosure/ComprehensiveTextBlockList
	Asset Retirement Obligation and Environmental Cost [Policy Text Block] `us-gaap:AssetRetirementObligationsAndEnvironmentalCostPolicyTextBlock`	parent-child	http://fasb.org/us-gaap/role/disclosure/AccountingPolicies