Retirement Plans and Profit Sharing Arrangements - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plans
Net periodic benefit cost, location	General and administrative expense	General and administrative expense
Pension Plans
Components of net periodic benefit cost
Service cost	$ 43	$ 45	$ 45
Interest cost	39	21	29
Expected return on plan assets	(70)	(57)	(55)
Amortization of prior service credits	(1)	(2)	(2)
Amortization of net loss	18	23	15
Other	3	5	7
Net periodic benefit cost	$ 32	$ 35	$ 39