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INTANGIBLES - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Intangible Assets Disclosure [Line Items] |  |  |
Trade names | $ 650.7 | $ 623.1 |
Intangible assets, amortization expense | $ 282.4 | $ 238.4 | $ 39.8
Valuation Technique, Discounted Cash Flow |  |  |
Intangible Assets Disclosure [Line Items] |  |  |
Goodwill impairment test, weight of approach | 0.75 |  |
Valuation, Market Approach |  |  |
Intangible Assets Disclosure [Line Items] |  |  |
Goodwill impairment test, weight of approach | 0.25 |  |
Trade names |  |  |
Intangible Assets Disclosure [Line Items] |  |  |
Useful life (in years) | 5 years |  |
Backlog |  |  |
Intangible Assets Disclosure [Line Items] |  |  |
Intangible assets, weighted average useful life (years) | 13 years |  |
Intellectual property |  |  |
Intangible Assets Disclosure [Line Items] |  |  |
Intangible assets, weighted average useful life (years) | 12 years |  |
Customer relationships |  |  |
Intangible Assets Disclosure [Line Items] |  |  |
Intangible assets, weighted average useful life (years) | 17 years |  |
Other intangible assets |  |  |
Intangible Assets Disclosure [Line Items] |  |  |
Intangible assets, weighted average useful life (years) | 8 years |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: 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 http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 926 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959 + Details
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- Definition Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trade name to gain or protect exclusive use thereof for a projected indefinite period of benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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