Goodwill and Other Intangible Assets - Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 13,476.3
Additions	361.5
Other	(0.9)
Currency translation adjustments	(164.1)
Balance at end of period	13,672.8
Application Software
Goodwill [Roll Forward]
Balance at beginning of period	8,889.3
Additions	361.5
Other	(0.2)
Currency translation adjustments	(59.6)
Balance at end of period	9,191.0
Network Software
Goodwill [Roll Forward]
Balance at beginning of period	3,655.3
Additions	0.0
Other	(0.7)
Currency translation adjustments	(102.8)
Balance at end of period	3,551.8
Technology Enabled Products
Goodwill [Roll Forward]
Balance at beginning of period	931.7
Additions	0.0
Other	0.0
Currency translation adjustments	(1.7)
Balance at end of period	$ 930.0