Accounting Policies 401k(Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Worksite Employee Plan [Member] | |||
| Defined Contribution Plan [Abstract] | |||
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 418.0 | $ 390.0 | $ 375.0 |
| Worksite Employee Plan [Member] | Minimum [Member] | |||
| Defined Contribution Plan [Abstract] | |||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 0.00% | ||
| Worksite Employee Plan [Member] | Maximum [Member] | |||
| Defined Contribution Plan [Abstract] | |||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 6.00% | ||
| CorporatePlan [Domain] | |||
| Defined Contribution Plan [Abstract] | |||
| Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 6.00% | 6.00% | |
| Defined Contribution Plan, Employer Matching Contribution, Percent of Match | 100.00% | ||
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 19.0 | $ 19.0 | $ 17.0 |