Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Accrued Expenses [Member]	Sep. 30, 2014 Tronox Litigation [Member] Pending Litigation [Member]	Mar. 31, 2014 Tronox Litigation [Member] Pending Litigation [Member]	Dec. 31, 2013 Tronox Litigation [Member] Pending Litigation [Member]
Income Tax Disclosure [Abstract]
U.S. federal statutory rate	35.00%	35.00%	35.00%	35.00%
Income Tax Disclosure [Line Items]
Deferred tax benefit							$ 282	$ 274
Tronox-related contingent loss	19	0	4,338	0		38	4,300	850
Uncertain tax position			155				1,100
Unrecognized tax positions estimated range of change within the next 12 months, lower bound	100		100
Unrecognized tax positions estimated range of change within the next 12 months, upper bound	130		130
Accrued income taxes					$ 793