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Restructuring - Summary of Restructuring and Other Charges (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2009
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Restructuring and Related Activities [Abstract]            
Restructuring costs   $ 9 $ 10 $ 9 $ 8 $ 24
Licensing dispute settlement 7   7 0 0  
Costs related to mergers and acquisitions 5   5 5 0  
Total restructuring and other charges     $ 22 $ 14 $ 8