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Retirement Plans and Profit Sharing Arrangements - Reconciliation of Changes in Fair Value of Assets (Details) - Pension Plans - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Change in fair value of plan assets    
Fair value of plan assets, beginning $ 1,292 $ 1,142
Actual return on plan assets 17 136
Employer contributions 50 56
Benefits paid (28) (23)
Acquisitions (18) 0
Settlements (50) (45)
Foreign currency rate changes (10) 26
Fair value of plan assets, ending $ 1,253 $ 1,292