UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Statement Of Other Comprehensive Income [Abstract]
Net income	$ 108	$ 22	$ 202	$ 31
Interest rate cash flow hedges:
Gain (loss) on interest rate cash flow hedges, net of tax	0	(17)	9	(96)
Reclassification adjustments for income on interest rate cash flow hedges	12	11	24	15
Pension and postretirement benefits income, net of tax	0	0	1	0
Total comprehensive income (loss)	120	$ 16	236	$ (50)
Less: Comprehensive income attributable to redeemable noncontrolling interests	80		158
Total comprehensive income attributable to McAfee Corp.	$ 40		$ 78