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Commitments and Contingencies - Future Minimum Lease Commitments Under Non-Cancellable Operating Leases with Initial or Remaining Terms of One Year or More (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
2013 $ 220
2014 176
2015 146
2016 111
2017 91
Thereafter 375
Total future lease commitments $ 1,119