CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions		Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Net Former Parent Investment
Beginning balance (in shares) at Dec. 29, 2018			0
Beginning balance at Dec. 29, 2018		$ 1,494	$ 0	$ 0	$ 0	$ (82)	$ 1,576
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss attributable to Covetrus	[1]	(13)			(21)		8
Dividend to Former Parent		(1,153)		0			(1,153)
Issuance of shares at Separation (including share sale investors) (in shares)			71,693,426
Issuance of shares at Separation (including Share Sale investors)		0	$ 1	608			(609)
Issuance of shares in connection with the Acquisition (in shares)			39,742,089
Issuance of shares in connection with the Acquisition		1,772		1,772
Net increase in Former Parent investment		178					178
Issuance of shares in connection with share-based compensation plans (in shares)			140,828
Issuance of shares in connection with share-based compensation plans		0		0
Share-based compensation		15		15
Other comprehensive income		1				1
Ending balance (in shares) at Mar. 31, 2019			111,576,343
Ending balance at Mar. 31, 2019		$ 2,294	$ 1	2,395	(21)	(81)	$ 0
Beginning balance (in shares) at Dec. 31, 2019		111,620,507	111,620,507
Beginning balance at Dec. 31, 2019		$ 1,256	$ 1	2,381	(1,040)	(86)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss attributable to Covetrus	[1]	(33)			(33)
Issuance of shares in connection with share-based compensation plans (in shares)			233,932
Issuance of shares in connection with share-based compensation plans		0		0
Share-based compensation		9		9
Other comprehensive income		$ (30)				(30)
Ending balance (in shares) at Mar. 31, 2020		111,854,439	111,854,439
Ending balance at Mar. 31, 2020		$ 1,202	$ 1	$ 2,390	$ (1,073)	$ (116)

[1] (a) Net income earned from January 1, 2019 through February 7, 2019 is attributed to the Former Parent as it was the sole shareholder prior to February 7, 2019