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Postretirement Benefit Plans - Rollforward of Plan Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Change in plan assets |  |
Plan assets as of January 1 | $ 0.5 | $ 0.5
Employer contributions | 11.0 | 10.5
Benefits and expenses paid | (11.1) | (10.3)
Settlement | 0.0 | (0.2)
Plan assets as of December 31 | 0.4 | 0.5
Funded status at end of year | (149.4) | (213.8)
Pension Plan [Member] |  |
Change in plan assets |  |
Plan assets as of January 1 | 0.5 |
Plan assets as of December 31 | 0.4 | 0.5
Funded status at end of year | (78.7) | (107.4)
Pension Plan [Member] | International Plan [Member] |  |
Change in plan assets |  |
Plan assets as of January 1 | 0.5 | 0.5
Employer contributions | 3.0 | 3.4
Benefits and expenses paid | (3.1) | (3.2)
Settlement | 0.0 | (0.2)
Plan assets as of December 31 | 0.4 | 0.5
Funded status at end of year | (67.5) | (92.6)
Pension Plan [Member] | United States |  |
Change in plan assets |  |
Plan assets as of January 1 | 0.0 | 0.0
Employer contributions | 0.9 | 0.9
Benefits and expenses paid | (0.9) | (0.9)
Settlement | 0.0 | 0.0
Plan assets as of December 31 | 0.0 | 0.0
Funded status at end of year | (11.2) | (14.8)
Other Postretirement Benefits Plan [Member] |  |
Change in plan assets |  |
Plan assets as of January 1 | 0.0 | 0.0
Employer contributions | 7.1 | 6.2
Benefits and expenses paid | (7.1) | (6.2)
Settlement | 0.0 | 0.0
Plan assets as of December 31 | 0.0 | 0.0
Funded status at end of year | $ (70.7) | $ (106.4)

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- Definition Defined Benefit Plan Benefits And Expenses Paid + References No definition available. + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI https://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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