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Calculation of Net Earnings (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 29, 2019	Mar. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 29, 2019	Jun. 30, 2018
Basic Earnings (Loss) Per Share
Net income (loss) from continuing operations	$ (24)		$ 19		$ (16)	$ 52
Income from discontinued operations, net of tax			(3)			5
Net income (loss)	$ (24)	$ 8	$ 16	$ 41	$ (16)	$ 57
Weighted-average shares outstanding	546		557		544	556
Continuing operations	$ (0.04)		$ 0.03		$ (0.03)	$ 0.09
Discontinued operations						0.01
Net basic earnings (loss) per common share	$ (0.04)		$ 0.03		$ (0.03)	$ 0.10
Diluted Earnings (Loss) Per Share
Net income (loss) from continuing operations	$ (24)		$ 19		$ (16)	$ 52
Income from discontinued operations, net of tax			(3)			5
Net income (loss)	$ (24)	$ 8	$ 16	$ 41	$ (16)	$ 57
Weighted-average shares outstanding	546		557		544	556
Stock options and restricted stock	3		8		8	8
Diluted weighted-average shares outstanding	549		565		552	564
Continuing operations	$ (0.04)		$ 0.03		$ (0.03)	$ 0.09
Discontinued operations						0.01
Net diluted earnings (loss) per common share	$ (0.04)		$ 0.03		$ (0.03)	$ 0.10

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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