Retirement Plans and Profit Sharing Arrangements - Pension Plans with Benefit Obligations in Excess of Plan Assets (Details) - Pension Plans - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plans
Accumulated benefit obligation	$ 1,800	$ 1,200
Pension plans with accumulated benefit obligations in excess of plan assets:
Accumulated benefit obligation	1,769	1,211
Fair value of plan assets	1,583	905
Pension plans with projected benefit obligations in excess of plan assets:
Projected benefit obligation	1,815	1,271
Fair value of plan assets	$ 1,583	$ 905