Goodwill (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill [Abstract]

Schedule of Goodwill

The table below details changes in the goodwill balance:

$ in millions	Net Book Value
January 1, 2020	8,509.4
Business combinations (See Note 2)	285.8
Foreign exchange	121.1
December 31, 2020	8,916.3
January 1, 2019	7,157.1
Business combinations (See Note 2)	1,229.1
Foreign exchange	123.2
December 31, 2019	8,509.4