UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (DEFICIT) AND REDEEMABLE NONCONTROLLING INTERESTS - USD ($) $ in Millions	Total	Redeemable Noncontrolling Interests	Foundation Technology Worldwide L L C Prior To Reorganization Transactions Accumulated Other Comprehensive Income (Loss)	Foundation Technology Worldwide L L C Prior To Reorganization Transactions Members' Equity (Deficit)	Foundation Technology Worldwide L L C Prior To Reorganization Transactions Accumulated Deficit	McAfee Corp. Stockholders' Equity	McAfee Corp. Stockholders' Equity Accumulated Other Comprehensive Income (Loss)	McAfee Corp. Stockholders' Equity Accumulated Deficit	McAfee Corp. Stockholders' Equity Common Stock Class A Common Stock	McAfee Corp. Stockholders' Equity Common Stock Class B Common Stock	McAfee Corp. Stockholders' Equity Additional Paid-in Capital	McAfee Corp. Stockholders' Equity Total Parent Entity Deficit
Balance at Dec. 28, 2019			$ (62)	$ (647)	$ (1,385)	$ (2,094)	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Balance, Shares at Dec. 28, 2019									0	0
Temporary equity, Balance at Dec. 28, 2019		$ 0
Distributions to Members	$ (131)			(131)
Other comprehensive loss, net of tax	(81)		(81)
Stock compensation expense, net of withholding to cover taxes	17			17
Unit issuances	1			1
Unit repurchases (Note 6)	(10)			(10)
Reclassification of redeemable units (Note 6)	(17)			(17)
Net income	31				31
Other	2			2
Balance at Jun. 27, 2020			(143)	(785)	(1,354)	(2,282)	0	0	$ 0	$ 0	0	0
Balance, Shares at Jun. 27, 2020									0	0
Temporary equity, Balance at Jun. 27, 2020		0
Balance at Mar. 28, 2020			(137)	(707)	(1,376)	(2,220)	0	0	$ 0	$ 0	0	0
Balance, Shares at Mar. 28, 2020									0	0
Temporary equity, Balance at Mar. 28, 2020		0
Distributions to Members	(81)			(81)
Other comprehensive loss, net of tax	(6)		(6)
Stock compensation expense, net of withholding to cover taxes	2			2
Unit issuances	1			1
Net income	22				22
Balance at Jun. 27, 2020			(143)	(785)	(1,354)	(2,282)	0	0	$ 0	$ 0	0	0
Balance, Shares at Jun. 27, 2020									0	0
Temporary equity, Balance at Jun. 27, 2020		0
Balance at Dec. 26, 2020	(6,640)		0	0	0	(1,800)	(45)	(118)	$ 0	$ 0	(6,477)	(6,640)
Balance, Shares at Dec. 26, 2020									161,267,412	267,065,127
Temporary equity, Balance at Dec. 26, 2020	4,840	4,840
Distributions to RNCI	(152)	(152)
Dividend declared	(38)										(38)	(38)
Other comprehensive loss, net of tax	34	22					12					12
Stock compensation expense, net of withholding to cover taxes	45										45	45
Stock compensation expense, net of withholding to cover taxes, Shares									2,237,271
Stock issuances	5										5	5
Stock issuances, Shares									222,153
RNCI units conversion into Class A shares									2,278,004	(1,688,436)
Net income	202	136						66				66
Impact of change in ownership in RNCI		42									(42)	(42)
Fair value adjustment for RNCI		2,799									(2,799)	(2,799)
Balance at Jun. 26, 2021	(9,391)		0	0	0	(1,704)	(33)	(52)	$ 0	$ 0	(9,306)	(9,391)
Balance, Shares at Jun. 26, 2021									166,004,840	265,376,691
Temporary equity, Balance at Jun. 26, 2021	7,687	7,687
Balance at Mar. 27, 2021			0	0	0	(1,783)	(37)	(88)			(7,835)	(7,960)
Balance, Shares at Mar. 27, 2021									162,372,554	267,065,127
Temporary equity, Balance at Mar. 27, 2021		6,177
Distributions to RNCI		(65)				(65)
Dividend declared						(19)					(19)	(19)
Other comprehensive loss, net of tax		8				12	4					4
Stock compensation expense, net of withholding to cover taxes						38					38	38
Stock compensation expense, net of withholding to cover taxes, Shares									1,132,129
Stock issuances						5					5	5
Stock issuances, Shares									222,153
RNCI units conversion into Class A shares									2,278,004	(1,688,436)
Net income	108	72				108		36				36
Impact of change in ownership in RNCI		38									(38)	(38)
Fair value adjustment for RNCI		1,457									(1,457)	(1,457)
Balance at Jun. 26, 2021	(9,391)		$ 0	$ 0	$ 0	$ (1,704)	$ (33)	$ (52)	$ 0	$ 0	$ (9,306)	$ (9,391)
Balance, Shares at Jun. 26, 2021									166,004,840	265,376,691
Temporary equity, Balance at Jun. 26, 2021	$ 7,687	$ 7,687