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Guarantees (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Guarantor Obligations [Line Items]
Environmental accruals for known contamination in carrying amount recorded for indemnifications	$ 175	$ 178
Australia Pacific APLNG [Member]
Guarantor Obligations [Line Items]
Ownership percentage in equity investment	37.50%
Continued development [Member] | Australia Pacific APLNG [Member]
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	$ 130
Continued development [Member] | Australia Pacific APLNG [Member] | Maximum [Member]
Guarantor Obligations [Line Items]
Terms of guarantees outstanding	up to 26 years or the life of the venture
Other Guarantees [Member]
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	$ 780
Other Guarantees [Member] | Maximum [Member]
Guarantor Obligations [Line Items]
Terms of guarantees outstanding	up to four years
Indemnifications [Member]
Guarantor Obligations [Line Items]
Environmental accruals for known contamination in carrying amount recorded for indemnifications	$ 30
Guarantor Obligations, Current Carrying Value	$ 80
Guarantee existing sales agreement of natural gas delivery | Australia Pacific APLNG [Member] | Maximum [Member]
Guarantor Obligations [Line Items]
Terms of guarantees outstanding	up to 23 years
Max potential future payments-reckless breach [Member] | Australia Pacific APLNG [Member]
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	$ 1,400
Max potential future payments-prorata share [Member] | Australia Pacific APLNG [Member]
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	760
Finance Reserve Guarantee [Member] | Australia Pacific APLNG [Member]
Guarantor Obligations [Line Items]
Maximum potential amount of future payments	$ 170
Terms of guarantees outstanding	12 years
Guarantor Obligations, Current Carrying Value	$ 14

X

- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 460
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No definition available.

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Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

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Describe the approximate term of the guarantee or each group of similar guarantees.

+ References

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