v3.3.1.900
Income Taxes Income Tax (Benefit) Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current Income Tax Expense (Benefit) [Abstract]      
Total current income tax expense $ 358 $ 354 $ 357
Deferred Income Tax Benefit [Abstract]      
Total deferred income tax benefit (194) (396) (346)
Income tax (benefit) expense 164 (42) 11
Ireland      
Current Income Tax Expense (Benefit) [Abstract]      
Ireland 8 (13) 17
Deferred Income Tax Benefit [Abstract]      
Ireland 1 2 0
United States - Federal      
Current Income Tax Expense (Benefit) [Abstract]      
United States - Federal 88 87 89
Deferred Income Tax Benefit [Abstract]      
United States - Federal (65) (224) (295)
United States - State and local      
Current Income Tax Expense (Benefit) [Abstract]      
United States - State and local 22 41 7
Deferred Income Tax Benefit [Abstract]      
United States - State and local (6) (49) (23)
Foreign - other      
Current Income Tax Expense (Benefit) [Abstract]      
Foreign - other 240 239 244
Deferred Income Tax Benefit [Abstract]      
Foreign - other $ (124) $ (125) $ (28)