Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)
Goodwill [Roll Forward]
Balances	$ 10,815.4
Additions	0.0
Other	1.0
Currency translation adjustments	(83.9)
Balances	10,732.5
Application Software
Goodwill [Roll Forward]
Balances	5,389.4
Additions	0.0
Other	0.7
Currency translation adjustments	(22.1)
Balances	5,368.0
Network Software & Systems
Goodwill [Roll Forward]
Balances	3,933.5
Additions	0.0
Other	0.3
Currency translation adjustments	(43.3)
Balances	3,890.5
Measurement & Analytical Solutions
Goodwill [Roll Forward]
Balances	1,178.0
Additions	0.0
Other	0.0
Currency translation adjustments	(12.4)
Balances	1,165.6
Process Technologies
Goodwill [Roll Forward]
Balances	314.5
Additions	0.0
Other	0.0
Currency translation adjustments	(6.1)
Balances	$ 308.4

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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Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments 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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