Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies [Abstract]

Future minimum rentals and minimum rentals to be received under subleases for leases having initial or remaining noncancelable lease terms in excess of one year

As of December 31, 2011, our future minimum rentals and minimum rentals to be received under subleases for leases having initial or remaining noncancelable lease terms in excess of one year were as follows (in millions):

2012	$	291
2013	198
2014	131
2015	106
2016	86
Thereafter	294
Total minimum rental payments	1,106
Less minimum rentals to be received under subleases	(41		)
Net minimum rental payments	$	1,065

Consolidated rental expense for all operating leases

Rental expense was as follows (in millions):

	Year Ended December 31,
	2011			2010			2009
Minimum rental expense	$	523		$	485		$	519
Contingent rental expense	23			23			21
Total rental expense	546			508			540
Less sublease rental income	(2		)	(3		)	(4		)
Net rental expense	$	544		$	505		$	536