Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies [Abstract]

Contractual obligations outstanding

	Total		Due in Less Than  1 Year		Due in 1-3  Years		Due in 3-5  Years		Due After 5 Years
Unconditional purchase obligations (a)	$	174	$	66	$	93	$	15	$	—
Other long-term obligations		1		1		—		—		—
Total contractual obligations	$	175	$	67	$	93	$	15	$	—

Commercial commitments outstanding

			Amount of Commitment Expiration Per Period
	Total		Less Than 1 Year		1-3 Years		3-5 Years		After 5  Years
Standby letters of credit	$	171	$	168	$	—	$	—	$	3