Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	35.00%	35.00%
Accrued Expenses [Member]
Income Tax Disclosure [Line Items]
Accrued income taxes	388,000,000
Tronox Litigation [Member] | Judicial Ruling [Member]
Income Tax Disclosure [Line Items]
Deferred tax benefit related to the Tronox settlement	577,000,000
Uncertain tax position	1,300,000,000
Tronox Litigation [Member] | Judicial Ruling [Member] | Other Assets [Member]
Income Tax Disclosure [Line Items]
Deferred tax benefit related to the Tronox settlement	561,000,000