v2.4.0.8
Income Taxes - (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Rate
Sep. 30, 2013
Sep. 30, 2014
Rate
Sep. 30, 2013
Income Tax Disclosure [Abstract]        
Income taxes $ 233 $ 178 $ 605 $ 441
Effective Income Tax Rate Reconciliation, Percent 38.70%   36.20%  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     35.00%  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount $ 58