Other Income and Expense (Nonoperating Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liquidation Basis of Accounting, Remeasurement, Gain (Loss) on Asset					$ 0
Total other income	$ 145		$ 72		120
Sales-type and Direct Financing Leases, Profit (Loss)	36	[1]	0		0
Loss On Sale And Disposal Of Assets	22	[2]	30	[2]	28
Defined Benefit Plan, Other Cost (Credit)	17		10		1
Allowance for other receivables	0		7		0
Water Rights Write-Off	0		0		19
Other Cost and Expense, Operating	5		11		10
Other Expenses	80		58		58
Other Income [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Insured Event, Gain (Loss)	118	[3]	0		0
Litigation Settlement, Amount Awarded from Other Party	0		0		60	[4]
Public Utilities, Allowance for Funds Used During Construction, Additions	3		8		26
Other	24		32		34
Total other income	145		$ 72		$ 120
Distributed Energy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales-type and Direct Financing Leases, Profit (Loss)	$ (36)

[1] Related to losses recognized at commencement of sales-type leases at Distributed Energy. See Note 14—Leases for further information.

[2] Associated with a loss due to damage from a lightning incident at the Andres facility in the Dominican Republic in September 2018 and a loss associated with upgrading the tunnel lining at Changuinola in 2019.

[3] Associated with recoveries for property damage at the Andres facility in the Dominican Republic from a lightning incident in September 2018 and the upgrade of the tunnel lining at Changuinola.

[4] In December 2016, the Company and YPF entered into a settlement in which all parties agreed to give up any and all legal action related to gas supply contracts that were terminated in 2008 and have been in dispute since 2009. In January 2017, the YPF board approved the agreement and paid the Company $60 million, thereby resolving all uncertainties around the dispute.