CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (35)	$ (962)	$ (14)	$ (985)
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss)	14	(22)	(2)	(17)
Unrealized gain (loss) on derivative instruments	(1)	(2)	(8)	(2)
Total other comprehensive income (loss)	13	(24)	(10)	(19)
Comprehensive income (loss)	(22)	(986)	(24)	(1,004)
Comprehensive (income) loss attributable to redeemable non-controlling interests:
Net (income) loss	0	3	(1)	3
Foreign currency translation (gain) loss	0	0	(2)	(1)
Comprehensive (income) loss attributable to redeemable non-controlling interests	0	3	(3)	2
Comprehensive income (loss) attributable to Covetrus	$ (22)	$ (983)	$ (27)	$ (1,002)