CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (4)	$ (35)	$ (51)	$ (14)
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss)	(13)	14	(17)	(2)
Gain (loss) on derivative instruments	(1)	(1)	3	(8)
Total other comprehensive income (loss)	(14)	13	(14)	(10)
Comprehensive income (loss)	(18)	(22)	(65)	(24)
Comprehensive (income) loss attributable to redeemable non-controlling interests:
Net (income) loss	0	0	0	(1)
Foreign currency translation (gain) loss	0	0	0	(2)
Comprehensive (income) loss attributable to redeemable non-controlling interests	0	0	0	(3)
Comprehensive income (loss) attributable to Covetrus	$ (18)	$ (22)	$ (65)	$ (27)