CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	Common Stock	Accumulated Other Comprehensive Income (Loss)	Additional Paid-in Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		136,017,964
Beginning balance at Dec. 31, 2020	$ 1,537	$ 1	$ (66)	$ 2,629	$ (1,027)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to Covetrus	(16)				(16)
Issuance of shares in connection with share-based compensation plans, net of shares withheld for taxes (in shares)		324,072
Issuance of shares in connection with share-based compensation plans, net of shares withheld for taxes	(3)			(3)
Share-based compensation	11			11
Other comprehensive income (loss)	(9)		(9)
Ending balance (in shares) at Mar. 31, 2021		136,342,036
Ending balance at Mar. 31, 2021	$ 1,520	$ 1	(75)	2,637	(1,043)
Beginning balance (in shares) at Dec. 31, 2021	138,011,969	138,011,969
Beginning balance at Dec. 31, 2021	$ 1,511	$ 1	(79)	2,670	(1,081)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) attributable to Covetrus	(2)				(2)
Issuance of shares in connection with the Acquisition (in shares)		573,365
Issuance of shares in connection with acquisitions	10			10
Issuance of shares in connection with share-based compensation plans, net of shares withheld for taxes (in shares)		558,026
Issuance of shares in connection with share-based compensation plans, net of shares withheld for taxes	(2)			(2)
Share-based compensation	13			13
Other comprehensive income (loss)	$ (2)		(2)
Ending balance (in shares) at Mar. 31, 2022	139,143,360	139,143,360
Ending balance at Mar. 31, 2022	$ 1,528	$ 1	$ (81)	$ 2,691	$ (1,083)