Calculation of Net Earnings (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016	Jul. 01, 2017	Jun. 25, 2016
Earnings Per Share [Line Items]
Net income from continuing operations	$ 21	$ 232	$ 95	$ 294
Income (loss) from discontinued operations, net of tax	3	(22)	45	(38)
Net income	$ 24	$ 210	$ 140	$ 256
Weighted-average shares outstanding	518	550	517	550
Basic earnings (loss) per share:
Continuing operations	$ 0.04	$ 0.42	$ 0.18	$ 0.53
Discontinued operations	0.01	(0.04)	0.09	(0.07)
Net earnings per share	$ 0.05	$ 0.38	$ 0.27	$ 0.47
Net income from continuing operations	$ 21	$ 232	$ 95	$ 294
Income (loss) from discontinued operations, net of tax	3	(22)	45	(38)
Net income	$ 24	$ 210	$ 140	$ 256
Weighted-average shares outstanding	518	550	517	550
Stock options and restricted stock	14	10	15	7
Diluted weighted-average shares outstanding	532	560	532	557
Diluted earnings (loss) per share
Continuing operations	$ 0.04	$ 0.41	$ 0.18	$ 0.53
Discontinued operations	0.01	(0.04)	0.08	(0.07)
Net diluted earnings per share	$ 0.05	$ 0.38	$ 0.26	$ 0.46