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Calculation of Net Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Basic Earnings Per Share
Net income from continuing operations	$ 60	$ 98	$ 113	$ 195
Income from discontinued operations, net of tax		(6)	5	38
Net income	$ 60	$ 92	$ 118	$ 233
Weighted-average shares outstanding	551	518	555	517
Continuing operations	$ 0.11	$ 0.19	$ 0.20	$ 0.38
Discontinued operations		(0.01)	0.01	0.07
Net basic earnings per common share	$ 0.11	$ 0.18	$ 0.21	$ 0.45
Diluted Earnings Per Share
Net income from continuing operations	$ 60	$ 98	$ 113	$ 195
Income from discontinued operations, net of tax		(6)	5	38
Net income	$ 60	$ 92	$ 118	$ 233
Weighted-average shares outstanding	551	518	555	517
Stock options and restricted stock	13	13	9	15
Diluted weighted-average shares outstanding	564	531	564	532
Continuing operations	$ 0.11	$ 0.19	$ 0.20	$ 0.37
Discontinued operations		(0.01)	0.01	0.07
Net diluted earnings per common share	$ 0.11	$ 0.17	$ 0.21	$ 0.44

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