XML 30 R155.htm IDEA: XBRL DOCUMENT v2.4.0.6
Commitments and Contingencies (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Minimum aggregate rental commitment under all noncancelable operating leases  
2012 $ 255
2013 221
2014 201
2015 160
2016 119
Thereafter 1,048
Total $ 2,004