Revenue (Tables)

12 Months Ended

Dec. 31, 2019

Revenue from Contract with Customer [Abstract]

Summary of Activity in Sales Rebates and Discounts Liability

The following table summarizes the activity in the sales rebates and discounts liability in the U.S.:

	Year Ended December 31,
	2019		2018
Beginning balance	$	118.5	$	114.8
Reduction of revenue	316.3		221.0
Payments	(284.4)		(217.3)
Ending balance	$	150.4	$	118.5

Disaggregation of Revenue

The following table summarizes our revenue disaggregated by product category for the years ended December 31:

	2019		2018		2017
Companion Animal Disease Prevention	$	787.9	$	804.6	$	660.2
Companion Animal Therapeutics	348.0		283.1		260.8
Food Animal Future Protein & Health	745.1		711.2		649.2
Food Animal Ruminants Swine	1,110.3		1,174.0		1,175.0
Strategic Exits(1)	79.7		93.9		143.8
Total Revenue	$	3,071.0	$	3,066.8	$	2,889.0

(1) Represents revenue from business activities we have either exited or made a strategic decision to exit.