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Employee Benefits - Summary of SERPs and Defined Benefit Plan and Deferred Compensation Plan (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Employee Benefits |  |  |
Balances in Deferred Compensation Plan | $ 51.0 | $ 41.2 |
Value of assets for funding future payouts under the deferred compensation plan | 51.0 | 41.2 |
Contributions to Multiemployer Plans | 5.4 | 5.4 | $ 4.8
Amounts recognized in the statement of financial position |  |  |
Noncurrent liabilities | (25.1) | (26.1) |
Weighted average assumptions to determine benefit obligations |  |  |
Deferred Compensation Plan expected employer contributions during 2024 | 2.4 |  |
Supplemental Executive Retirement Plans |  |  |
Employee Benefits |  |  |
Settlement losses related to payment of benefits |  | 2.3 |
Change in benefit obligation |  |  |
Benefit obligation at beginning of year | 18.8 | 36.4 |
Service cost | 0.3 | 0.4 | 1.0
Interest cost | 0.9 | 0.7 | 0.6
Actuarial loss (gain) | 1.0 | (5.6) |
Benefits paid | (0.8) | (0.8) |
Plan settlements |  | (12.3) |
Benefit obligation at end of year | 20.2 | 18.8 | 36.4
Funded status |  |  |
Funded status of the plans | (20.2) | (18.8) |
Items not yet recognized as component of net periodic pension expense |  |  |
Unrecognized net actuarial losses (gains) | 2.9 | 1.9 |
Accumulated other comprehensive loss | 2.9 | 1.9 |
Amounts recognized in the statement of financial position |  |  |
Current liabilities | (0.8) | (0.8) |
Noncurrent liabilities | (19.4) | (18.0) |
Accumulated other comprehensive loss | 2.9 | 1.9 |
Net amount recognized | (17.3) | (16.9) |
Accumulated benefit obligation | 18.2 | 17.1 |
Components of net periodic benefit cost |  |  |
Service cost | 0.3 | 0.4 | 1.0
Interest cost | 0.9 | 0.7 | 0.6
Settlement loss |  | 2.3 |
Amortization of net loss |  | 0.6 | 1.8
Net periodic benefit cost | $ 1.2 | $ 4.0 | $ 3.4
Weighted average assumptions to determine net cost |  |  |
Discount rate (as a percent) | 4.58% | 2.17% | 1.64%
Rate of compensation increase (as a percent) | 6.00% | 6.00% | 6.00%
Weighted average assumptions to determine benefit obligations |  |  |
Discount rate (as a percent) | 4.35% | 4.51% |
Rate of compensation increase (as a percent) | 6.00% | 6.00% |
Expected employer contributions during 2024 | $ 0.8 |  |
Defined Benefit Plan |  |  |
Change in benefit obligation |  |  |
Benefit obligation at beginning of year | 55.0 | $ 74.5 |
Service cost | 1.3 | 2.0 | $ 2.2
Interest cost | 2.7 | 2.0 | 1.8
Actuarial loss (gain) | 1.0 | (21.0) |
Benefits paid | (2.5) | (2.5) |
Plan amendments | 2.5 |  |
Benefit obligation at end of year | 60.0 | 55.0 | 74.5
Change in plan assets |  |  |
Fair value of plan assets at beginning of year | 56.7 | 70.9 |
Actual return on plan assets | 9.6 | (11.7) |
Benefits paid | (2.5) | (2.5) |
Fair value of plan assets at end of year | 63.8 | 56.7 | 70.9
Funded status |  |  |
Funded status of the plans | 3.8 | 1.7 |
Items not yet recognized as component of net periodic pension expense |  |  |
Unrecognized net actuarial losses (gains) | (4.7) | 0.5 |
Unamortized prior service cost | 4.8 | 2.8 |
Accumulated other comprehensive loss | 0.1 | 3.3 |
Amounts recognized in the statement of financial position |  |  |
Noncurrent assets | 3.8 | 1.7 |
Accumulated other comprehensive loss | 0.1 | 3.3 |
Net amount recognized | 3.9 | 5.0 |
Components of net periodic benefit cost |  |  |
Service cost | 1.3 | 2.0 | 2.2
Interest cost | 2.7 | 2.0 | 1.8
Expected return on plan assets | (3.3) | (4.2) | (3.9)
Prior service (credit) cost | 0.5 | 0.5 | 0.6
Amortization of net loss |  |  | 0.8
Net periodic benefit cost | $ 1.2 | $ 0.3 | $ 1.5
Weighted average assumptions to determine net cost |  |  |
Discount rate (as a percent) | 5.00% | 2.70% | 2.40%
Expected long-term rate of return on plan assets (as a percent) | 6.00% | 6.00% | 6.25%
Weighted average assumptions to determine benefit obligations |  |  |
Discount rate (as a percent) | 4.80% | 5.00% |
Expected long-term rate of return on plan assets (as a percent) | 6.00% | 6.00% |
Expected employer contributions during 2024 | $ 0.0 |  |
Warehouse, delivery, selling, general and administrative expense | Supplemental Executive Retirement Plans |  |  |
Components of net periodic benefit cost |  |  |
Net periodic benefit cost | 0.3 | $ 0.4 | $ 1.0
Warehouse, delivery, selling, general and administrative expense | Defined Benefit Plan |  |  |
Components of net periodic benefit cost |  |  |
Net periodic benefit cost | 1.3 | 2.0 | 2.2
Other (income) expense, net | Supplemental Executive Retirement Plans |  |  |
Components of net periodic benefit cost |  |  |
Net periodic benefit cost | 0.9 | 3.6 | 2.4
Other (income) expense, net | Defined Benefit Plan |  |  |
Components of net periodic benefit cost |  |  |
Net periodic benefit cost | $ (0.1) | $ (1.7) | $ (0.7)

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