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Leases and Rentals (Tables)
12 Months Ended
Dec. 31, 2011
Leases and Rentals [Abstract]  
Future minimum operating lease payments under long-term operating leases
           

2012

    $ 17  

2013

      12  

2014

      10  

2015

      9  

2016

      8  

2017 and thereafter

      78  
           

Total minimum lease payments

    $ 134