CONSOLIDATED AND COMBINED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 29, 2018	Dec. 30, 2017
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (1,022)	$ 107	$ 92
Other comprehensive (loss) income, net of tax:
Foreign currency translation (loss) gain	(3)	(43)	62
Unrealized (loss) gain from foreign currency hedging activities		(1)	1
Unrealized loss on derivative instruments	(1)
Pension adjustment gain	0	2	0
Total other comprehensive (loss) income	(4)	(42)	63
Comprehensive (loss) income	(1,026)	65	155
Comprehensive loss (income) attributable to redeemable non-controlling interests:
Net loss (income)	3	(6)	(28)
Foreign currency translation (gain) loss	(1)	2	(3)
Less: comprehensive loss (income) attributable to redeemable non-controlling interests	2	(4)	(31)
Comprehensive (loss) income attributable to Covetrus	$ (1,024)	$ 61	$ 124