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Financial Instruments (Change in Fair Values) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Derivative [Line Items]
Unrealized gain (loss) on derivatives	$ (140)	$ (1,411)
Fixed Price Preemptive Rights [Member]
Derivative [Line Items]
Unrealized gain (loss) on derivatives	(45)	(434)
Warrant [Member]
Derivative [Line Items]
Unrealized gain (loss) on derivatives	$ (95)	$ (977)

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No definition available.

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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