Goodwill and Other Intangible Assets - Goodwill (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 15,946.1
Other	0.1
Currency translation adjustments	16.6
Balance at end of period	15,962.8
Application Software
Goodwill [Roll Forward]
Balance at beginning of period	11,417.5
Other	0.1
Currency translation adjustments	5.9
Balance at end of period	11,423.5
Network Software
Goodwill [Roll Forward]
Balance at beginning of period	3,598.3
Other	0.0
Currency translation adjustments	10.9
Balance at end of period	3,609.2
Technology Enabled Products
Goodwill [Roll Forward]
Balance at beginning of period	930.3
Other	0.0
Currency translation adjustments	(0.2)
Balance at end of period	$ 930.1