XML 108 R86.htm IDEA: XBRL DOCUMENT v3.6.0.2
Goodwill and Intangible Assets Goodwill and Intangible Assets (Schedule of Core Deposit Intangible Estimated Future Amortization Expense (Details) - Core deposit intangible - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]    
2017 $ 2  
2018 2  
2019 2  
2020 1  
2021 1  
Total $ 8 $ 10