Other Income and Expense - Other Income (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2019		Jun. 30, 2018	Jun. 30, 2019		Jun. 30, 2018
Schedule of Other Nonoperating Income [Line Items]
Other income	$ 18		$ 7	$ 48		$ 20
Other Income [Member]
Schedule of Other Nonoperating Income [Line Items]
Gain on insurance proceeds (1)	12	[1]	0	35	[1]	0
Allowance for funds used during construction (US Utilities)	1		2	2		7
Other income	5		5	11		13
Other Nonoperating Income	$ 18		$ 7	$ 48		$ 20

[1] ⁽¹⁾ Associated with recoveries for property damage at the Andres facility in the Dominican Republic for a lightning incident that occurred in September 2018.