Commitments and Contingencies

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies and Litigation [Abstract]

Commitments and Contingencies

16. Commitments and Contingencies

We lease some of our offices, buildings, machinery and equipment, and autos under noncancelable operating leases. These leases have various terms and renewal options. Lease expense amounted to $80 million in 2011, $90 million in 2010 and $94 million in 2009. Future minimum lease payments required under operating leases with initial or remaining noncancelable terms in excess of one year as of December 31, 2011 were $63 million in 2012, $55 million in 2013, $40 million in 2014, $29 million in 2015 and $24 million in 2016. The aggregate obligation after 2016 was $82 million.