Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and intangible assets were (in millions):

	December 31,
	2020						2019
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Goodwill	$	10,141.6	$	(531.9)	$	9,609.7	$	9,957.5	$	(517.0)	$	9,440.5
Intangible assets:
Purchased and internally developed software	$	377.6	$	(307.0)	$	70.6	$	350.7	$	(288.5)	$	62.2
Customer related and other	738.1		(510.2)		227.9		746.7		(470.7)		276.0
	$	1,115.7	$	(817.2)	$	298.5	$	1,097.4	$	(759.2)	$	338.2

Changes in Goodwill

Changes in goodwill were (in millions):

	Year Ended December 31,
	2020		2019
January 1	$	9,440.5	$	9,384.3
Acquisitions	50.8		5.5
Noncontrolling interests in acquired businesses	31.6		17.2
Contingent purchase price obligations of acquired businesses	—		24.7
Dispositions	(18.8)		(19.1)
Foreign currency translation	105.6		27.9
December 31	$	9,609.7	$	9,440.5