Retirement Plans and Profit Sharing Arrangements - Components of Net Periodic Benefit Cost (Details) - Pension Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of net periodic benefit cost
Service cost	$ 45	$ 45	$ 44
Interest cost	21	29	36
Expected return on plan assets	(57)	(55)	(53)
Amortization of prior service credits	(2)	(2)
Amortization of net loss	23	15	5
Other	5	7	8
Net periodic benefit cost	$ 35	$ 39	$ 40