Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Details)

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Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization of Intangible Assets $ 40 $ 41 $ 72 $ 77
Remainder of 2015 74   74  
2016 152   152  
2017 142   142  
2018 102   102  
2019 $ 99   $ 99