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Net Income Attributable to Company Per Share - Computation of Weighted Average Basic and Diluted Shares Outstanding (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net income (loss) attributable to Company	$ (119)	$ 310
Denominator:
Basic-weighted average common shares outstanding	375	407
Dilutive effect of employee stock options and other unvested stock awards		2
Diluted outstanding shares	375	409
Basic	$ (0.32)	$ 0.76
Diluted	(0.32)	0.76
Cash dividends per share	$ 0.46	$ 0.46

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Aggregate dividends paid during the period for each share of common stock outstanding.

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