Goodwill and Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Changes in Goodwill
Goodwill, January 1	$ 9,734.3	$ 9,738.6
Goodwill, Acquisitions	0.0	215.2
Goodwill, Noncontrolling interests in acquired businesses	0.0	47.8
Goodwill, Dispositions	(1.4)	(19.4)
Goodwill, Foreign currency translation	59.7	(30.3)
Goodwill, March 31	9,792.6	9,951.9
Intangible assets:
Intangible assets, Gross Carrying Value	1,135.2		$ 1,133.3
Intangible assets, Accumulated Amortization	(834.9)		(819.9)
Intangible assets, Net Carrying Value	300.3		313.4
Goodwill, impairment losses	0.0	$ 0.0
Goodwill, accumulated impairment losses	0.0
Purchased and internally developed software
Intangible assets:
Intangible assets, Gross Carrying Value	374.2		374.8
Intangible assets, Accumulated Amortization	(309.8)		(309.1)
Intangible assets, Net Carrying Value	64.4		65.7
Customer related and other
Intangible assets:
Intangible assets, Gross Carrying Value	761.0		758.5
Intangible assets, Accumulated Amortization	(525.1)		(510.8)
Intangible assets, Net Carrying Value	$ 235.9		$ 247.7