Goodwill (Schedule of Goodwill) (Details) $ in Thousands	3 Months Ended
Jun. 30, 2020 USD ($)
Goodwill [Line Items]
Balance at March 31, 2020	$ 3,795,325
Acquisitions	336,677
Dispositions	(24,073)
Effects of foreign currency	4,931
Reclassifications	20
Balance at June 30, 2020	4,112,880
Software and Analytics [Member]
Goodwill [Line Items]
Balance at March 31, 2020	1,770,118
Acquisitions	850
Dispositions	(24,073)
Effects of foreign currency	4,931
Reclassifications	20
Balance at June 30, 2020	1,751,845
Network Solutions [Member]
Goodwill [Line Items]
Balance at March 31, 2020	1,645,831
Acquisitions	335,635
Balance at June 30, 2020	1,981,466
Technolgy-Enabled Services [Member]
Goodwill [Line Items]
Balance at March 31, 2020	379,376
Acquisitions	192
Balance at June 30, 2020	$ 379,568

Goodwill, Reclassifications

No definition available.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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