XML 87 R49.htm IDEA: XBRL DOCUMENT v3.8.0.1
Loans and Loans Held for Sale - Loans Held for Sale (Detail) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Commercial and industrial $ 194 $ 139  
Total loans held for sale 1,667 [1] 1,107 [1] $ 1,341
Commercial Mortgage [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Real estate 1,426 897  
Residential Mortgage [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Real estate $ 47 $ 71  
[1] Total loans held for sale include real estate — residential mortgage loans held for sale at fair value of $47 million at March 31, 2018, and $71 million at December 31, 2017.