Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	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%
Income Tax Disclosure [Line Items]
Deferred tax benefit			$ 282,000,000	$ 274,000,000
Tronox-related contingent loss	4,300,000,000	0	4,300,000,000	850,000,000
Uncertain tax position			$ 1,100,000,000