Benefit Plans Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Pension plans with an accumulated benefit obligation in excess of plan assets:
Fair value of plan assets	$ 24	$ 77
Accumulated benefit obligation	72	131
Pension plans with a projected benefit obligation in excess of plan assets:
Projected benefit obligation	152	162
Pension Plan [Member]
Pension plans with a projected benefit obligation in excess of plan assets:
Fair value of plan assets	$ 84	$ 83