XML 71 R57.htm IDEA: XBRL DOCUMENT v3.21.2
Acquisitions (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Business Combination and Asset Acquisition [Abstract]        
Acquisition-related expenses $ 6.3 $ 0.6 $ 17.9 $ 1.6