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Retirement Benefits (Tables) | 6 Months Ended
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Jun. 30, 2024
Retirement Benefits [Abstract] |
Schedule Of Defined Benefit Plans Disclosures | For the quarters ended June 30, 2024 and July 2, 2023, the components of pension and other postretirement benefit expense for the Company’s defined benefit plans included the following (in millions):
| Pension Benefits |  | Other Postretirement Benefits
| Quarter ended |  | Quarter ended
| June 30, 2024 |  | July 2, 2023 |  | June 30, 2024 |  | July 2, 2023
Service cost - benefits earned during the year | $ | 1.4 |  |  | $ | 1.6 |  |  | $ | 0.1 |  |  | $ | 0.1 |
Interest cost on benefits earned in prior years | 4.1 |  |  | 24.0 |  |  | 2.6 |  |  | 2.8 |
Expected return on plan assets | (4.1) |  |  | (25.6) |  |  | — |  |  | — |
Amortization of prior service cost (credit) | — |  |  | 0.1 |  |  | (0.2) |  |  | (0.3) |
Amortization of net actuarial loss | — |  |  | — |  |  | 1.3 |  |  | 1.5 |
Total retirement benefit expense | $ | 1.4 |  |  | $ | 0.1 |  |  | $ | 3.8 |  |  | $ | 4.1 |
For the year-to-date periods ended June 30, 2024 and July 2, 2023, the components of pension and other postretirement benefit expense for the Company’s defined benefit plans included the following (in millions):
| Pension Benefits |  | Other Postretirement Benefits
| Year-to-date period ended |  | Year-to-date period ended
| June 30, 2024 |  | July 2, 2023 |  | June 30, 2024 |  | July 2, 2023
Service cost - benefits earned during the year | $ | 2.9 |  |  | $ | 3.2 |  |  | $ | 0.2 |  |  | $ | 0.3 |
Interest cost on benefits earned in prior years | 8.2 |  |  | 48.0 |  |  | 5.1 |  |  | 5.5 |
Expected return on plan assets | (8.2) |  |  | (51.3) |  |  | — |  |  | — |
Amortization of prior service cost (credit) | 0.1 |  |  | 0.2 |  |  | (0.4) |  |  | (0.5) |
Amortization of net actuarial loss | — |  |  | — |  |  | 2.6 |  |  | 3.0 |
Total retirement benefit expense | $ | 3.0 |  |  | $ | 0.1 |  |  | $ | 7.5 |  |  | $ | 8.3 |

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- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 20 -Topic 715 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-4 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-2 + Details
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