Other Income and Expense - Other Income (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2020		Jun. 30, 2019	Jun. 30, 2020		Jun. 30, 2019
Schedule of Other Nonoperating Income [Line Items]
Other Nonoperating Income	$ 9		$ 18	$ 54		$ 48
Other Income [Member]
Schedule of Other Nonoperating Income [Line Items]
Gain (Loss) on Disposition of Other Assets	0	[1]	0	43	[1]	0
Gain on insurance proceeds (2)	0	[2]	12	0		35	[2]
Other income	9		6	11		13
Other Nonoperating Income	$ 9		$ 18	$ 54		$ 48

[1] Primarily associated with the gain on sale of Redondo Beach land at Southland. See Note 18—Held-for-Sale and Dispositions for further information.

[2] Associated with recoveries for property damage at the Andres facility in the Dominican Republic from a lightning incident in September 2018.