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Environmental and Other Contingencies (Details) $ in Millions | Jun. 30, 2022 USD ($)
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Environmental Remediation Obligations [Abstract] |
Threshold for disclosure of monetary sanctions, environmental proceedings | $ 1.0

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- Definition Threshold For Disclosure Of Monetary Sanctions, Environmental Proceedings + References No definition available. + Details
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Namespace Prefix: | mur_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration