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Long-lived Assets (Schedule of Intangible Assets Subject to Amortization, Net) (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Gross carrying amount | $ 3,319.7 | $ 3,498.7
Accumulated amortization | (701.9) | (612.7)
Net carrying amount | 2,617.8 | 2,886.0
Customer relationships |  |
Property, Plant and Equipment [Line Items] |  |
Gross carrying amount | 2,287.9 | 2,426.6
Accumulated amortization | (327.5) | (246.4)
Net carrying amount | 1,960.4 | 2,180.2
Other |  |
Property, Plant and Equipment [Line Items] |  |
Gross carrying amount | 1,031.8 | 1,072.1
Accumulated amortization | (374.4) | (366.3)
Net carrying amount | $ 657.4 | $ 705.8

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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