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Net Periodic Benefit Cost - Defined Benefit Plans (Tables) | 9 Months Ended
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Sep. 28, 2019
Notes To Financial Statements [Abstract] |
Components of Net Periodic Benefit Cost | Following are the components of net periodic pension expense (benefit) for the three and nine months ended September 28, 2019 and September 29, 2018:
| Third Quarter
| Pension Benefits |  | Other Benefits
| U.S. Plans |  | Non-U.S. Plans |  | All Plans
(Millions of Dollars) | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
Service cost | $ | 3.1 |  |  | $ | 1.8 |  |  | $ | 3.5 |  |  | $ | 3.8 |  |  | $ | 0.1 |  |  | $ | 0.1 |
Interest cost | 11.8 |  |  | 10.7 |  |  | 7.4 |  |  | 7.0 |  |  | 0.4 |  |  | 0.4 |
Expected return on plan assets | (15.4 | ) |  | (17.2 | ) |  | (11.1 | ) |  | (11.4 | ) |  | — |  |  | — |
Amortization of prior service cost (credit) | 0.2 |  |  | 0.3 |  |  | (0.1 | ) |  | (0.4 | ) |  | (0.3 | ) |  | (0.3 | )
Amortization of net loss (gain) | 2.0 |  |  | 2.0 |  |  | 2.1 |  |  | 1.8 |  |  | (0.1 | ) |  | — |
Settlement / curtailment loss (gain) | — |  |  | — |  |  | (0.2 | ) |  | 0.1 |  |  | — |  |  | — |
Net periodic pension expense (benefit) | $ | 1.7 |  |  | $ | (2.4 | ) |  | $ | 1.6 |  |  | $ | 0.9 |  |  | $ | 0.1 |  |  | $ | 0.2 |
| Year-to-Date
| Pension Benefits |  | Other Benefits
| U.S. Plans |  | Non-U.S. Plans |  | All Plans
(Millions of Dollars) | 2019 |  | 2018 |  | 2019 |  | 2018 |  | 2019 |  | 2018
Service cost | $ | 9.3 |  |  | $ | 5.6 |  |  | $ | 10.9 |  |  | $ | 11.5 |  |  | $ | 0.2 |  |  | $ | 0.4 |
Interest cost | 35.3 |  |  | 32.1 |  |  | 22.7 |  |  | 21.7 |  |  | 1.2 |  |  | 1.2 |
Expected return on plan assets | (46.3 | ) |  | (51.5 | ) |  | (34.1 | ) |  | (35.4 | ) |  | — |  |  | — |
Amortization of prior service cost (credit) | 0.7 |  |  | 0.8 |  |  | (0.5 | ) |  | (1.0 | ) |  | (1.0 | ) |  | (1.0 | )
Amortization of net loss (gain) | 6.0 |  |  | 5.9 |  |  | 6.5 |  |  | 6.5 |  |  | (0.2 | ) |  | — |
Settlement / curtailment loss | — |  |  | — |  |  | — |  |  | 0.3 |  |  | — |  |  | — |
Net periodic pension expense (benefit) | $ | 5.0 |  |  | $ | (7.1 | ) |  | $ | 5.5 |  |  | $ | 3.6 |  |  | $ | 0.2 |  |  | $ | 0.6 |
The components of net periodic benefit cost other than the service cost component are included in Other, net in the Consolidated Statements of Operations and Comprehensive Income.

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- Definition Notes to Financial Statements [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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