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Quarterly Financial Data (Unaudited) - Summarized Quarterly Results (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 1,969	$ 1,835	$ 1,759	$ 1,741	$ 1,692	$ 1,646	$ 1,724	$ 2,189	$ 7,304	$ 7,251	$ 14,757
Gross profit (loss)	167	285	231	209	(459)	79	35	244	892	(101)	3,063
Net loss attributable to Company	$ (14)	$ (26)	$ (75)	$ (122)	$ (714)	$ (1,362)	$ (217)	$ (119)	$ (237)	$ (2,412)	$ (769)
Net loss attributable to Company per basic share	$ (0.04)	$ (0.07)	$ (0.20)	$ (0.32)	$ (1.90)	$ (3.62)	$ (0.58)	$ (0.32)	$ (0.63)	$ (6.41)	$ (1.99)
Net loss attributable to Company per diluted share	(0.04)	(0.07)	(0.20)	(0.32)	(1.90)	(3.62)	(0.58)	(0.32)	(0.63)	(6.41)	(1.99)
Cash dividends per share	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.46	$ 0.20	$ 0.61	$ 1.84

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

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