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Goodwill and Intangible Assets
 6 Months Ended
Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Goodwill and Intangible Assets
Goodwill and intangible assets were (in millions):
 June 30, 2021December 31, 2020
Gross
Carrying
Value		Accumulated
Amortization		Net
Carrying
Value		Gross
Carrying
Value		Accumulated
Amortization		Net
Carrying
Value
Goodwill$10,253.4 $(530.2)$9,723.2 $10,141.6 $(531.9)$9,609.7 
Intangible assets:      
Purchased and internally
developed software
$380.3 $(313.7)$66.6 $377.6 $(307.0)$70.6 
Customer related and other740.7 (529.4)211.3 738.1 (510.2)227.9 
 $1,121.0 $(843.1)$277.9 $1,115.7 $(817.2)$298.5 
Changes in goodwill were (in millions):
Six Months Ended June 30,
20212020
January 1$9,609.7 $9,440.5 
Acquisitions17.8 1.7 
Noncontrolling interests in acquired businesses37.3 — 
Contingent purchase price obligations of acquired businesses88.0 — 
Dispositions(21.6)(3.1)
Foreign currency translation(8.0)(184.0)
June 30
$9,723.2 $9,255.1