Fair Value (Details Textuals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Fair Value Disclosures [Abstract]
Equity securities realized gains	$ 7	$ 1	$ 24
Equity securities realized losses				$ 1