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Asset Retirement Obligations - Schedule of Carrying Value of Recorded AROs by Major Category (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Asset Retirement Obligation Disclosure [Abstract]
Spent pot lining disposal	$ 182	$ 182
Closure of bauxite residue areas	179	190
Mine reclamation	178	189
Demolition	68	28
Landfill closure	18	17
Other	4	4
Asset retirement obligation, total	$ 629	$ 610	$ 579

The estimated amount of costs required as of the balance sheet date to comply with regulatory requirements pertaining to the retirement of a waste management facility, which will be paid after one year or beyond the normal operating cycle, if longer.

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