Goodwill and Other Intangible Assets - Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 15,946.1
Goodwill acquired	12.2
Other	0.6
Currency translation adjustments	43.6
Balance at end of period	16,002.5
Application Software
Goodwill [Roll Forward]
Balance at beginning of period	11,417.5
Goodwill acquired	12.2
Other	0.6
Currency translation adjustments	15.7
Balance at end of period	11,446.0
Network Software
Goodwill [Roll Forward]
Balance at beginning of period	3,598.3
Goodwill acquired	0.0
Other	0.0
Currency translation adjustments	27.2
Balance at end of period	3,625.5
Technology Enabled Products
Goodwill [Roll Forward]
Balance at beginning of period	930.3
Goodwill acquired	0.0
Other	0.0
Currency translation adjustments	0.7
Balance at end of period	$ 931.0