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FINANCING ARRANGEMENTS - Components of Long-Term Debt (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Debt Instrument [Line Items] |  |
Principal Amount | $ 1,870.8 | $ 1,873.3
Unamortized discount and debt issuance cost | 13.1 | 14.4
Long-term Debt, Total | 1,857.7 | 1,858.9
Less short-term and current portion of long-term debt, Principal Amount | 608.6 | 8.6
Less short-term and current portion of long-term debt, Unamortized discount and debt issuance cost | 1.1 | 0.0
Less short-term and current portion of long-term debt | 607.5 | 8.6
Total long-term debt, gross, net of current | 1,262.2 | 1,864.7
Debt excluding current, unamortized discount and debt issuance costs | 12.0 | 14.4
Total long-term debt, net of current portion | 1,250.2 | 1,850.3
Senior secured revolving credit facility due 2026 | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Principal Amount | 0.0 | 0.0
Unamortized discount and debt issuance cost | 0.0 | 0.0
Long-term Debt, Total | $ 0.0 | $ 0.0
Weighted average interest rate | 0.00% | 0.00%
Senior secured term loan due 2026 | Secured Debt |  |
Debt Instrument [Line Items] |  |
Principal Amount | $ 609.8 | $ 611.5
Unamortized discount and debt issuance cost | 5.7 | 6.2
Long-term Debt, Total | $ 604.1 | $ 605.3
Weighted average interest rate | 1.89% | 1.85%
5.25% Senior Notes Due 2023 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 5.25% | 5.25%
Principal Amount | $ 600.0 | $ 600.0
Unamortized discount and debt issuance cost | 1.1 | 1.4
Long-term Debt, Total | $ 598.9 | $ 598.6
Weighted average interest rate | 5.25% | 5.25%
5.75% Senior Notes Due 2025 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 5.75% | 5.75%
Principal Amount | $ 650.0 | $ 650.0
Unamortized discount and debt issuance cost | 6.3 | 6.8
Long-term Debt, Total | $ 643.7 | $ 643.2
Weighted average interest rate | 5.75% | 5.75%
Other Debt |  |
Debt Instrument [Line Items] |  |
Principal Amount | $ 11.0 | $ 11.8
Unamortized discount and debt issuance cost | 0.0 | 0.0
Long-term Debt, Total | $ 11.0 | $ 11.8

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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