Asset Acquisitions, Dispositions and Other - Distribution of Shares of California Resources (Details) $ in Millions	1 Months Ended
Mar. 31, 2016 USD ($)
Spin-off California Resources Corp
Acquisitions, dispositions and other transactions
Impairment charges related to a special stock dividend of California Resources shares	$ 78

Impairment charges related to a special stock dividend of California Resources shares

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration