Calculation of Net Earnings (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 29, 2018	[1],[3]	Sep. 29, 2018	[1]	Jun. 30, 2018	[1]	Mar. 31, 2018	[1]	Dec. 30, 2017	[1],[4]	Sep. 30, 2017	[1]	Jul. 01, 2017	[1]	Apr. 01, 2017	[1]	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Basic Earnings Per Share
Net income from continuing operations	$ (14)	[2]	$ 60	[2]	$ 19	[2]	$ 33	[2]	$ (48)	[5]	$ 98	[5]	$ 21	[5]	$ 74	[5]	$ 99	$ 146	$ 679
Income (Loss) from discontinued operations, net of tax					(3)		8		(4)		(6)		3		42		5	35	(150)
Net income	$ (14)		$ 60		$ 16		$ 41		$ (52)		$ 92		$ 24		$ 116		$ 104	$ 181	$ 529
Weighted-average shares outstanding																	553	522	539
Continuing operations	$ (0.02)		$ 0.11		$ 0.03		$ 0.06		$ (0.09)		$ 0.19		$ 0.04		$ 0.14		$ 0.18	$ 0.28	$ 1.26
Discontinued operations							0.01		(0.01)		(0.01)		0.01		0.08		0.01	0.07	(0.28)
Net basic earnings per common share	$ (0.02)		$ 0.11		$ 0.03		$ 0.07		$ (0.10)		$ 0.18		$ 0.05		$ 0.22		$ 0.19	$ 0.35	$ 0.98
Diluted Earnings Per Share
Net income from continuing operations	$ (14)	[2]	$ 60	[2]	$ 19	[2]	$ 33	[2]	$ (48)	[5]	$ 98	[5]	$ 21	[5]	$ 74	[5]	$ 99	$ 146	$ 679
Income (Loss) from discontinued operations, net of tax					(3)		8		(4)		(6)		3		42		5	35	(150)
Net income	$ (14)		$ 60		$ 16		$ 41		$ (52)		$ 92		$ 24		$ 116		$ 104	$ 181	$ 529
Weighted-average shares outstanding																	553	522	539
Stock options and restricted stock																	11	13	10
Diluted weighted-average shares outstanding																	564	535	549
Continuing operations	$ (0.02)		$ 0.11		$ 0.03		$ 0.06		$ (0.09)		$ 0.19		$ 0.04		$ 0.14		$ 0.18	$ 0.27	$ 1.24
Discontinued operations							0.01		(0.01)		(0.01)		0.01		0.08		0.01	0.06	(0.27)
Net diluted earnings per common share	$ (0.02)		$ 0.11		$ 0.03		$ 0.07		$ (0.10)		$ 0.17		$ 0.05		$ 0.22		$ 0.19	$ 0.34	$ 0.96

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

[2] 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.

[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.

[4] Includes $205 million of incremental sales from acquisitions in the fourth quarter of 2017.

[5] The third quarter of 2017 includes a non-cash tax benefit of approximately $37 million from the release of valuation allowances on deferred tax assets. The fourth quarter includes $18 million of net loss from businesses acquired in 2017.