XML 41 R44.htm IDEA: XBRL DOCUMENT v2.4.0.8
Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Income Tax Disclosure [Abstract]      
Effective income tax rate 46.00% 5.00%  
Unrecognized tax benefits $ 69   $ 61
Percentage of future payments to existing share holders, US federal income tax cash savings 85.00%    
Recognized an initial liability recorded against the Pre-IPO Tax Assets 321    
Valuation allowance 66    
Payments made under tax receivable agreement $ 0