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Future Annual Minimum Rental Commitments, Net of Contractual Subleases (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Operating Leases  
2013 $ 112
2014 97
2015 85
2016 74
2017 62
Thereafter 108
Total 538
Subleases  
2013 31
2014 28
2015 28
2016 28
2017 22
Thereafter 11
Total 148
Net  
2013 81
2014 69
2015 57
2016 46
2017 40
Thereafter 97
Total $ 390