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Goodwill and Other Intangible Assets, Net - Goodwill (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Goodwill [Roll forward]  
Beginning balance $ 11,400.1
Acquisitions 32.5
Divestitures 0.0
Adjustments to Acquisitions (1.0)
Ending balance 11,431.6
Group 1  
Goodwill [Roll forward]  
Beginning balance 6,150.6
Acquisitions 17.4
Divestitures 0.0
Adjustments to Acquisitions (1.0)
Ending balance 6,167.0
Group 2  
Goodwill [Roll forward]  
Beginning balance 5,249.5
Acquisitions 15.1
Divestitures 0.0
Adjustments to Acquisitions 0.0
Ending balance $ 5,264.6