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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Minimum Rental Commitments

As of December 31, 2016, minimum rental commitments under non-cancelable operating leases in effect at year-end were (in millions):

 

                                                                                                                 

2017

   2018      2019      2020      2021      Thereafter      Total  

$            241

   $ 175       $ 143       $ 115       $ 90       $ 157       $ 921