Segment Data - Adjusted EBITDA by geographic location and reconciliation of Net Income (loss) by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 244	$ 226	$ 200
Net income (loss) attributable to Covetrus	(54)	(19)	(980)
Plus: Depreciation and amortization	171	167	154
Plus: Interest expense, net	32	46	54
Less: Income tax (benefit) expense	0	(7)	(46)
Earnings (loss) before interest, taxes, depreciation, and amortization	149	187	(818)
Plus: Share-based compensation	46	40	46
Plus: Strategic consulting (a)	20	20	2
Plus: Transaction costs	3	8	2
Plus: Formation of Covetrus	2	19	31
Plus: Separation programs and executive severance	14	17	11
Plus: Equity method investment and non-consolidated affiliates	3	2	(4)
Plus: IT infrastructure	0	4	6
Plus: Carve-out operating expenses	0	0	5
Plus: Goodwill impairment	0	0	938
Plus: Capital structure	0	2	0
Plus: Other impairments	7	8	0
Plus: Other items, net	0	(81)	(19)
Non-GAAP Adjusted EBITDA	244	226	200
Corporate
Segment Reporting Information [Line Items]
Adjusted EBITDA	(90)	(61)	(39)
Non-GAAP Adjusted EBITDA	(90)	(61)	(39)
Eliminations
Segment Reporting Information [Line Items]
Adjusted EBITDA	0	0	0
Non-GAAP Adjusted EBITDA	0	0	0
North America | Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA	223	187	153
Non-GAAP Adjusted EBITDA	223	187	153
Europe | Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA	71	72	68
Non-GAAP Adjusted EBITDA	71	72	68
APAC & Emerging Markets | Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA	40	28	18
Non-GAAP Adjusted EBITDA	$ 40	$ 28	$ 18