Employee Benefit Plans (Schedule of Plan with ABO in Excess of Plan Assets) (Details) - Pension Plan [Member] - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 22,116	$ 28,960
Accumulated benefit obligation	22,080	28,494
Fair value of plan assets	$ 17,747	$ 22,002