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Employee Retirement Benefits - Defined Contribution Plan (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Defined Benefit Plan Disclosure    
Matching contributions to 401(k) and Top Hat plans $ 11,000,000 $ 9,000,000
Qualified Pension Plans    
Defined Benefit Plan Disclosure    
Pension contributions $ 0