Goodwill and Intangible Assets - Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 1,396.9	$ 1,392.7
Accumulated Amortization	(596.3)	(552.7)
Net Book Value	800.6	840.0
Customer lists
Finite-Lived Intangible Assets
Gross Carrying Amount	936.4	959.1
Accumulated Amortization	(378.3)	(351.4)
Net Book Value	558.1	607.7
Developed technology
Finite-Lived Intangible Assets
Gross Carrying Amount	373.7	380.5
Accumulated Amortization	(210.3)	(194.8)
Net Book Value	163.4	185.7
Tradenames
Finite-Lived Intangible Assets
Gross Carrying Amount	86.8	51.5
Accumulated Amortization	(7.7)	(4.9)
Net Book Value	79.1	46.6
Non-compete agreements
Finite-Lived Intangible Assets
Gross Carrying Amount	0.0	1.6
Accumulated Amortization	0.0	(1.6)
Net Book Value	$ 0.0	$ 0.0

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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)
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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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

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