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BENEFIT PLANS - RECONCILIATION FOR THE PLAN ASSETS CATEGORIZED AS LEVEL 3 (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Change in Plan Assets. Level 3 [Roll Forward] |  |
Fair value of plan assets at beginning of year | $ 173.1 | $ 185.7
Actual return on plan assets: |  |
Effect of exchange rate changes | 1.9 | (2.4)
Fair value of plan assets at end of year | 185.1 | 173.1
Level 3 |  |
Change in Plan Assets. Level 3 [Roll Forward] |  |
Fair value of plan assets at beginning of year | 35.1 | 36.4
Actual return on plan assets: |  |
Relating to assets still held at the reporting date | 2.4 | (1.7)
Purchases, sales and settlements, net | 2.3 | 1.8
Effect of exchange rate changes | (0.4) | (1.4)
Fair value of plan assets at end of year | 39.4 | 35.1
Level 3 | Insurance contracts |  |
Change in Plan Assets. Level 3 [Roll Forward] |  |
Fair value of plan assets at beginning of year | 27.7 | 29.0
Actual return on plan assets: |  |
Relating to assets still held at the reporting date | 3.7 | (1.1)
Purchases, sales and settlements, net | (0.6) | 1.1
Effect of exchange rate changes | (0.6) | (1.3)
Fair value of plan assets at end of year | 30.2 | 27.7
Level 3 | Hedge funds |  |
Change in Plan Assets. Level 3 [Roll Forward] |  |
Fair value of plan assets at beginning of year | 7.1 | 7.1
Actual return on plan assets: |  |
Relating to assets still held at the reporting date | (1.3) | (0.6)
Purchases, sales and settlements, net | 2.9 | 0.7
Effect of exchange rate changes | 0.2 | (0.1)
Fair value of plan assets at end of year | 8.9 | 7.1
Level 3 | Real estate |  |
Change in Plan Assets. Level 3 [Roll Forward] |  |
Fair value of plan assets at beginning of year | 0.3 | 0.3
Actual return on plan assets: |  |
Relating to assets still held at the reporting date | 0.0 | 0.0
Purchases, sales and settlements, net | 0.0 | 0.0
Effect of exchange rate changes | 0.0 | 0.0
Fair value of plan assets at end of year | $ 0.3 | $ 0.3

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- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: 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 http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 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 http://asc.fasb.org/extlink&oid=118255775&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 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 6: 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 http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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