XML 107 R92.htm IDEA: XBRL DOCUMENT v3.24.1
Pension and Postretirement Plans - Assumptions (Details)
4 Months Ended 8 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 07, 2021
Dec. 31, 2023
Dec. 31, 2022
Cincinnati Plans [Member]        
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]        
Healthcare cost trend     7.00% 6.50%
Rate to which the cost trend is assumed to decline (ultimate trend rate)     4.80% 4.80%
Year the rates reach the ultimate trend rate     2033 2032
Cincinnati Plans [Member] | Pension Plans, Defined Benefit [Member]        
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]        
Discount rate 2.60% 2.40% 5.40% 2.70%
Expected long-term rate of return 6.00% 6.00% 6.00% 5.80%
Cash balance interest credit rate 4.00% 4.00% 4.00% 4.00%
Future compensation growth rate 0.00% 0.00% 0.00% 0.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]        
Discount rate     5.00% 5.40%
Cash balance interest credit rate     4.00% 4.00%
Future compensation growth rate     0.00% 0.00%
Cincinnati Plans [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]        
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]        
Discount rate 2.60% 2.40% 5.40% 2.80%
Expected long-term rate of return 0.00% 0.00% 0.00% 0.00%
Cash balance interest credit rate 0.00% 0.00% 0.00% 0.00%
Future compensation growth rate 0.00% 0.00% 0.00% 0.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]        
Discount rate     5.00% 5.40%
Cash balance interest credit rate     0.00% 0.00%
Future compensation growth rate     0.00% 0.00%
Hawaii Plans [Member] | Pension Plans, Defined Benefit [Member]        
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]        
Discount rate 2.50% 2.30% 5.40% 3.90%
Expected long-term rate of return 6.00% 6.00% 5.50% 5.00%
Cash balance interest credit rate 1.10% 1.20% 5.10% 1.90%
Future compensation growth rate 0.00% 0.00% 0.00% 0.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]        
Discount rate     5.00% 5.40%
Cash balance interest credit rate     0.00% 5.10%
Future compensation growth rate     0.00% 0.00%
Hawaii Plans [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]        
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]        
Discount rate 2.80% 2.60% 5.50% 3.70%
Expected long-term rate of return 0.00% 0.00% 0.00% 0.00%
Cash balance interest credit rate 0.00% 0.00% 0.00% 0.00%
Future compensation growth rate 0.00% 0.00% 0.00% 0.00%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]        
Discount rate     5.10% 5.50%
Cash balance interest credit rate     0.00% 0.00%
Future compensation growth rate     0.00% 0.00%