Retirement Plans and Profit Sharing Arrangements - Pension Plans with Benefit Obligations in Excess of Plan Assets (Details) - Pension Plans - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plans
Accumulated benefit obligation	$ 1,300	$ 1,200
Pension plans with accumulated benefit obligations in excess of plan assets:
Accumulated benefit obligation	945	874
Fair value of plan assets	803	688
Pension plans with projected benefit obligations in excess of plan assets:
Projected benefit obligation	972	903
Fair value of plan assets	$ 803	$ 688