Commitments and Contingencies (Schedule of Estimated Losses) (Details) $ in Millions	6 Months Ended
Jun. 30, 2020 USD ($)
Loss Contingencies [Line Items]
Balance at December 31, 2019	$ 4,568
Balance at June 30, 2020	4,561
2017/2018 Wildfire/Mudslide Event
Loss Contingencies [Line Items]
Balance at December 31, 2019	4,541
Accrued losses	0
Payments	(13)
Balance at June 30, 2020	$ 4,528

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Amount of loss contingency liability.

+ 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
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

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