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Employee Benefit Plans - Allocation of plan assets (Details)
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]    
Target allocation 100.00%  
Percentage of plan assets at end of period 100.00% 100.00%
US equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Target allocation 13.00%  
Percentage of plan assets at end of period 13.00% 13.00%
Non-US equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Target allocation 27.00%  
Percentage of plan assets at end of period 31.00% 31.00%
Fixed-income securities    
Defined Benefit Plan Disclosure [Line Items]    
Target allocation 55.00%  
Percentage of plan assets at end of period 55.00% 55.00%
Other    
Defined Benefit Plan Disclosure [Line Items]    
Target allocation 5.00%  
Percentage of plan assets at end of period 1.00% 1.00%