v3.2.0.727
Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Income Tax Disclosure [Abstract]        
Effective tax rate 11.00% 203.00% 9.00% 20.00%
Total pretax special items impacting adjusted effective tax rate       $ 494
Adjusted effective income tax rate, percent   8.00% 6.00%