Calculation of Net Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 28, 2019	[2]	Sep. 28, 2019	[2]	Jun. 29, 2019	[2]	Mar. 30, 2019	[2]	Dec. 29, 2018	[2]	Sep. 29, 2018	[2]	Jun. 30, 2018	[2]	Mar. 31, 2018	[2]	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Basic Earnings Per Share
Net income from continuing operations									$ (14)	[1]	$ 60	[1]	$ 19	[1]	$ 33	[1]	$ 99	$ 99	$ 146
Income from discontinued operations, net of tax													(3)		8			5	35
Net income	$ 55		$ 60		$ (24)		$ 8		$ (14)		$ 60		$ 16		$ 41		$ 99	$ 104	$ 181
Weighted-average shares outstanding																	545	553	522
Continuing operations									$ (0.02)	[3]	$ 0.11	[3]	$ 0.03	[3]	$ 0.06	[3]	$ 0.18	$ 0.18	$ 0.28
Discontinued operations															0.01	[3]		0.01	0.07
Net basic earnings per common share	$ 0.10	[3]	$ 0.11	[3]	$ (0.04)	[3]	$ 0.01	[3]	$ (0.02)	[3]	$ 0.11	[3]	$ 0.03	[3]	$ 0.07	[3]	$ 0.18	$ 0.19	$ 0.35
Diluted Earnings Per Share
Net income from continuing operations									$ (14)	[1]	$ 60	[1]	$ 19	[1]	$ 33	[1]	$ 99	$ 99	$ 146
Income from discontinued operations, net of tax													(3)		8			5	35
Net income	$ 55		$ 60		$ (24)		$ 8		$ (14)		$ 60		$ 16		$ 41		$ 99	$ 104	$ 181
Weighted-average shares outstanding																	545	553	522
Stock options and restricted stock																	8	11	13
Diluted weighted-average shares outstanding																	553	564	535
Continuing operations									$ (0.02)	[3]	$ 0.11	[3]	$ 0.03	[3]	$ 0.06	[3]	$ 0.18	$ 0.18	$ 0.27
Discontinued operations															0.01	[3]		0.01	0.06
Net diluted earnings per common share	$ 0.10	[3]	$ 0.11	[3]	$ (0.04)	[3]	$ 0.01	[3]	$ (0.02)	[3]	$ 0.11	[3]	$ 0.03	[3]	$ 0.07	[3]	$ 0.18	$ 0.19	$ 0.34

[1] Includes a loss on debt modification of $15 million and a tax benefit of $4 million due to a book-to-tax basis difference related to the sale of Clearpath Holdings, LLC in the fourth quarter of 2018.

[2] Due to rounding, the sum of the quarterly amounts may not equal the reported amounts for the year.

[3] The sum of the quarterly earnings per share does not equal the annual earnings per share due to differences in quarterly and annual weighted-average shares outstanding.