Retirement Plans and Profit Sharing Arrangements - Weighted Average Assumptions (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Plans
Weighted average assumptions used to determine benefit obligations
Discount rates (as a percent)	2.46%	2.16%
Rates of increase in compensation levels (as a percent)	3.72%	3.96%
Interest crediting rates for cash balance plans (as a percent)	5.00%	5.00%
Weighted average assumptions used to determine net periodic benefit cost
Discount rates (as a percent)	2.33%	2.97%	4.00%
Rates of increase in compensation levels (as a percent)	5.21%	4.01%	4.25%
Expected long term rates of return on assets (as a percent)	6.58%	7.14%	7.18%
Interest crediting rates for cash balance plans (as a percent)	5.00%	5.00%	5.00%
Other Postretirement Plans
Weighted average assumptions used to determine benefit obligations
Discount rates (as a percent)	2.01%	2.01%