XML 106 R97.htm IDEA: XBRL DOCUMENT v3.22.1
Debt (Pledged Assets Related to Secured Borrowings and Repurchase Agreement) (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, restricted as collateral $ 29,680 $ 27,420
Secured debt 11,030 7,619
Short-term borrowings 3,950 0
Consumer    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, mortgage finance receivables 18,655 17,941
Consumer | Automotive loan    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, finance receivables 10,015 9,122
Consumer | Credit card receivables    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, finance receivables 0 347
Commercial    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, finance receivables 1,010 10
Ally Bank    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, restricted as collateral 29,680 27,420
Secured debt 11,030 7,619
Ally Bank | Pledged assets for Federal Home Loan Bank    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, restricted as collateral 18,700 18,000
Ally Bank | Pledged assets for Federal Reserve Bank    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, restricted as collateral 2,400 2,400
Ally Bank | Consumer    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, mortgage finance receivables 18,655 17,941
Ally Bank | Consumer | Automotive loan    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, finance receivables 10,015 9,122
Ally Bank | Consumer | Credit card receivables    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, finance receivables 0 347
Ally Bank | Commercial    
Pledged Assets related to secured borrowings [Line Items]    
Pledged assets, finance receivables $ 1,010 $ 10