Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Beginning balances	$ 9,346.8	$ 8,820.3
Goodwill acquired	1,447.0	717.5
Goodwill related to assets held for sale		(156.2)
Currency translation adjustments	22.6	(39.7)
Reclassifications and other	(1.0)	4.9
Ending balances	10,815.4	9,346.8
Application Software
Goodwill [Roll Forward]
Beginning balances	5,236.1	4,565.4
Goodwill acquired	143.4	684.4
Goodwill related to assets held for sale		0.0
Currency translation adjustments	8.3	(17.0)
Reclassifications and other	1.6	3.3
Ending balances	5,389.4	5,236.1
Network Software & Systems
Goodwill [Roll Forward]
Beginning balances	2,623.7	2,591.3
Goodwill acquired	1,303.6	33.1
Goodwill related to assets held for sale		0.0
Currency translation adjustments	8.8	(2.3)
Reclassifications and other	(2.6)	1.6
Ending balances	3,933.5	2,623.7
Measurement &Analytical Solutions
Goodwill [Roll Forward]
Beginning balances	1,174.7	1,345.4
Goodwill acquired	0.0	0.0
Goodwill related to assets held for sale		(156.2)
Currency translation adjustments	3.3	(14.5)
Reclassifications and other	0.0	0.0
Ending balances	1,178.0	1,174.7
Process Technologies
Goodwill [Roll Forward]
Beginning balances	312.3	318.2
Goodwill acquired	0.0	0.0
Goodwill related to assets held for sale		0.0
Currency translation adjustments	2.2	(5.9)
Reclassifications and other	0.0	0.0
Ending balances	$ 314.5	$ 312.3

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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