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Goodwill and Other Intangible Assets, Net - Goodwill (Details)
$ in Millions
9 Months Ended
Sep. 30, 2020
USD ($)
Goodwill [Roll forward]  
Beginning balance $ 11,633.4
Acquisitions 95.7
Divestitures (18.6)
Adjustments to Acquisitions 1.6
Ending balance 11,712.1
Group 1  
Goodwill [Roll forward]  
Beginning balance 6,235.6
Acquisitions 15.3
Divestitures 0.0
Adjustments to Acquisitions (2.4)
Ending balance 6,248.5
Group 2  
Goodwill [Roll forward]  
Beginning balance 5,397.8
Acquisitions 80.4
Divestitures (18.6)
Adjustments to Acquisitions 4.0
Ending balance $ 5,463.6