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Restructuring (Restructuring Liability) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Restructuring Liability [Roll Forward] |  |  |
Utilization | $ (10.4) | $ 16.9 | $ (32.3)
2022 Repositioning |  |  |
Restructuring Liability [Roll Forward] |  |  |
Utilization | (14.4) | 0.0 | 0.0
2020 Repositioning |  |  |
Restructuring Liability [Roll Forward] |  |  |
Utilization | 0.0 | 3.7 | (32.1)
2019 Repositioning |  |  |
Restructuring Liability [Roll Forward] |  |  |
Utilization | 4.0 | (0.1) | (6.1)
2017 Repositioning |  |  |
Restructuring Liability [Roll Forward] |  |  |
Utilization | 0.0 | 13.3 | 6.2
Severance |  |  |
Restructuring Liability [Roll Forward] |  |  |
Beginning balance | 12.2 | 24.9 |
Expense (Gain) | 13.2 | 0.1 |
Adjustment | 0.0 | (1.4) |
Utilization | (8.8) | (11.4) |
Ending balance | 16.6 | 12.2 | 24.9
Severance | 2022 Repositioning |  |  |
Restructuring Liability [Roll Forward] |  |  |
Beginning balance | 0.0 | 0.0 |
Expense (Gain) | 14.4 | 0.0 |
Adjustment | 0.0 | 0.0 |
Utilization | (0.2) | 0.0 |
Ending balance | 14.2 | 0.0 | 0.0
Severance | 2020 Repositioning |  |  |
Restructuring Liability [Roll Forward] |  |  |
Beginning balance | 0.0 | 4.2 |
Expense (Gain) | 0.0 | 0.0 |
Adjustment | 0.0 | (0.9) |
Utilization | 0.0 | (3.3) |
Ending balance | 0.0 | 0.0 | 4.2
Severance | 2019 Repositioning |  |  |
Restructuring Liability [Roll Forward] |  |  |
Beginning balance | 11.5 | 16.0 |
Expense (Gain) | (1.2) | 0.1 |
Adjustment | 0.0 | 0.0 |
Utilization | (7.9) | (4.6) |
Ending balance | 2.4 | 11.5 | 16.0
Severance | 2017 Repositioning |  |  |
Restructuring Liability [Roll Forward] |  |  |
Beginning balance | 0.7 | 4.7 |
Expense (Gain) | 0.0 | 0.0 |
Adjustment | 0.0 | (0.5) |
Utilization | (0.7) | (3.5) |
Ending balance | $ 0.0 | $ 0.7 | $ 4.7

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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 45 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=109237686&loc=d3e17752-110868 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI https://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(1)) -URI https://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI https://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI https://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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