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Goodwill and Identifiable Intangible Assets - Identifiable Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 461.5 | $ 461.1 |
Accumulated Amortization | 283.2 | 279.8 |
Net | 178.3 | 181.3 |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Total intangible assets, Gross Carrying Amount | 486.0 | 501.5 |
Total intangible assets, Net | 202.8 | 221.7 |
Intangible amortization expense | 33.1 | 32.9 | $ 35.9
Trademark/trade name rights |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |
Indefinite lived intangible assets | 24.5 | 40.4 |
Customer relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 392.1 | 382.0 |
Accumulated Amortization | 236.5 | 226.5 |
Net | 155.6 | 155.5 |
Supplier agreements |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 31.9 | 39.0 |
Accumulated Amortization | 18.0 | 19.8 |
Net | 13.9 | 19.2 |
Others |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 37.5 | 40.1 |
Accumulated Amortization | 28.6 | 33.5 |
Net | $ 8.8 | $ 6.6 |

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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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