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Summary Of Significant Accounting Policies (Schedule of Components of Investments) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items]
Investments	$ 402	$ 12
Catalyst [Member]
Summary Of Significant Accounting Policies [Line Items]
% Interest	50.00%
Investments	$ 368
Other [Member]
Summary Of Significant Accounting Policies [Line Items]
Investments	$ 34

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Percentage of interest in investments.

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Summary Of Significant Accounting Policies [Line Items]

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- Definition

Sum of the carrying amounts as of the balance sheet date of all investments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(h))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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