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Long-lived Assets (Schedule of Intangible Assets Subject to Amortization, Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Gross carrying amount	$ 4,217.6	$ 4,194.4
Accumulated amortization	(3,645.5)	(3,163.2)
Net carrying amount	572.1	1,031.2
Customer relationships
Gross carrying amount	3,653.9	3,673.1
Accumulated amortization	(3,363.6)	(2,914.2)
Net carrying amount	290.3	758.9
Other
Gross carrying amount	563.7	521.3
Accumulated amortization	(281.9)	(249.0)
Net carrying amount	$ 281.8	$ 272.3
Minimum | Customer relationships
Estimated useful life at December 31, 2019	5 years
Minimum | Other
Estimated useful life at December 31, 2019	2 years
Maximum | Customer relationships
Estimated useful life at December 31, 2019	10 years
Maximum | Other
Estimated useful life at December 31, 2019	15 years

X

- 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

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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

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- Definition

Amount before 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 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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-Topic 350
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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
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