Income Taxes (Details - Valuation Allowance Rollforward) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Valuation allowance, beginning of period	$ (20)	$ (23)	$ (35)
Additions related to reduced federal benefit	0	0	(4)
Reductions related to the wind-down of foreign operations	1	2	14
(Additions) reductions related to state valuation allowance	(1)	1	2
Valuation allowance, end of period	$ (20)	(20)	$ (23)
Valuation Allowance [Abstract]
Valuation allowance, deferred tax asset, increase (decrease), amount		$ (3)