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Contingencies (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)
Contingencies (Textual) [Abstract]
Maximum period of limit for loan repayment	15 years
Maximum period of limit for repayment regarding leases with foreign lenders	20 years
Maximum period of contract range of specified parties related to legal liability	25 years
Asset retirement obligations, noncurrent	$ 5

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- Definition

Contingencies.

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No definition available.

+ Details

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- Definition

Maximum period of contract where we indemnify specified parties against legal liability arising out of actions by other parties.

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No definition available.

+ Details

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- Definition

Maximum period of indemnities related to bank loan.

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No definition available.

+ Details

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- Definition

Maximum period of indemnities related to leases with foreign lenders.

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No definition available.

+ Details

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- Definition

Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

+ Details

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