XML 106 R91.htm IDEA: XBRL DOCUMENT v3.22.0.1
Employee Benefit Plans - Weighed Average Assumptions Used (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Discount Rates      
Expected long-term return on plan assets 6.50% 6.75% 7.00%
DB Pension Plan      
Discount Rates      
Benefit Cost for Plan Year 2.24% 3.04% 4.08%
Benefit Obligation at End of Plan Year 2.63% 2.24% 3.04%
Life and Healthcare Plan      
Discount Rates      
Benefit Cost for Plan Year 2.33% 3.10% 4.13%
Benefit Obligation at End of Plan Year 2.69% 2.33% 3.10%
Rate of compensation increase      
Benefit Cost for Plan Year 4.00% 4.00% 4.00%
Benefit Obligation at End of Plan Year 4.00% 4.00% 4.00%
SERP Plan      
Discount Rates      
Benefit Cost for Plan Year 2.37% 3.14% 4.16%
Benefit Obligation at End of Plan Year 2.71% 2.37% 3.14%
Rate of compensation increase      
Benefit Cost for Plan Year 5.00% 5.00% 5.00%
Benefit Obligation at End of Plan Year 5.00% 5.00% 5.00%