Income Taxes (Details Textuals) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Actual tax rates	25.50%	21.30%	24.40%	30.40%
Unrecognized tax benefits change as a result of potential resolutions of prior years' tax	$ 144		$ 144
Unrecognized tax benefits that, if recognized, could impact effective tax rate	$ 114		$ 114