Goodwill (Schedule of Goodwill) (Details) $ in Thousands	3 Months Ended
Jun. 30, 2021 USD ($)
Goodwill [Line Items]
Balance at March 31, 2021	$ 4,108,792
Acquisitions
Dispositions
Effects of foreign currency	3,430
Adjustments
Balance at June 30, 2021	4,112,222
Software and Analytics [Member]
Goodwill [Line Items]
Balance at March 31, 2021	1,758,302
Acquisitions
Dispositions
Effects of foreign currency	3,430
Adjustments
Balance at June 30, 2021	1,761,732
Network Solutions [Member]
Goodwill [Line Items]
Balance at March 31, 2021	1,970,739
Acquisitions
Dispositions
Effects of foreign currency
Adjustments
Balance at June 30, 2021	1,970,739
Technology-Enabled Services [Member]
Goodwill [Line Items]
Balance at March 31, 2021	379,752
Acquisitions
Dispositions
Effects of foreign currency
Adjustments
Balance at June 30, 2021	$ 379,752

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.

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