Contingencies - Tronox Litigation (Detail) (USD $)	3 Months Ended			3 Months Ended	12 Months Ended		3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Tronox Litigation [Member] Pending Litigation [Member]	Dec. 31, 2013 Tronox Litigation [Member] Pending Litigation [Member]	Mar. 31, 2014 Tronox Litigation [Member] Pending Litigation [Member] London Interbank Offered Rate (LIBOR) [Member]	Mar. 31, 2014 Tronox Litigation [Member] Pending Litigation [Member] Excluding interest and attorneys' fees and costs [Member]	Mar. 31, 2014 Tronox Litigation [Member] Pending Litigation [Member] Principal portion of loss contingency accrual [Member]
Loss Contingencies [Line Items]
Damages sought, in excess of							$ 18,850,000,000
Tronox-related contingent liability	5,150,000,000		0	5,150,000,000				3,980,000,000
Pre-settlement interest rate				6.00%
Post-settlement interest rate, first 180 days				1.50%
Post-settlement interest rate, after 180 days						1.50%
Tronox-related contingent loss	$ 4,300,000,000	$ 0		$ 4,300,000,000	$ 850,000,000