CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (16)	$ (33)
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss)	(11)	(22)
Gain (loss) on derivative instruments	2	(8)
Total other comprehensive income (loss)	(9)	(30)
Comprehensive income (loss)	(25)	(63)
Comprehensive (income) loss attributable to redeemable non-controlling interests:
Net (income) loss	0	0
Foreign currency translation (gain) loss	(1)	(1)
Comprehensive (income) loss attributable to redeemable non-controlling interests	(1)	(1)
Comprehensive income (loss) attributable to Covetrus	$ (26)	$ (64)