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Retirement Plans and Profit Sharing Arrangements - Components of Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plans      
Net periodic benefit cost, location General and administrative expense General and administrative expense General and administrative expense
Pension Plans      
Components of net periodic benefit cost      
Service cost $ 28 $ 29 $ 43
Interest cost 66 65 39
Expected return on plan assets (79) (76) (70)
Amortization of prior service credits (1) (1) (1)
Amortization of net loss 0 0 18
Other 1 3 3
Net periodic benefit cost $ 15 $ 20 $ 32