Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2011

Asset Retirement Obligations [Abstract]

Schedule Of Carrying Value Of Recorded AROs By Major Category

December 31,	2011		2010
Spent pot lining disposal	$	187	$	177
Closure of bauxite residue areas		173		156
Mine reclamation		164		156
Demolition*		34		24
Landfill closure		17		19
Other		4		2
	$	579	$	534

* In 2011 and 2010, AROs were recorded as a result of management's decision to permanently shut down and demolish certain structures, each of which was previously temporarily idled for different reasons (see Note D).

Schedule Of Changes In Total Carrying Value Of Recorded AROs

December 31,	2011			2010
Balance at beginning of year	$	534		$	453
Accretion expense		22			21
Payments		(86	)		(38	)
Liabilities incurred		115			43
Translation and other		(6	)		55
Balance at end of year	$	579		$	534