v3.22.0.1
Loans - Summary of Consumer Loans by Refreshed FICO Credit Score (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 162,135 $ 119,989
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 100.00% 100.00%
FICO [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 11,884 $ 8,093
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 100.00% 100.00%
Installment [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 3,672 $ 3,823
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 100.00% 100.00%
Installment [Member] | FICO [Member]    
Financing Receivable, Recorded Investment [Line Items]    
2021 and 2020 $ 2,059 $ 1,359
2020 and 2019 705 1,357
2019 and 2018 569 942
2018 and 2017 299 158
2017 and 2016 39 7
2016 1  
Total loans, gross $ 3,672 $ 3,823
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 100.00% 100.00%
Credit card [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 8,212 $ 4,270
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 100.00% 100.00%
Credit card [Member] | FICO [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 8,212 $ 4,270
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 100.00% 100.00%
Greater than or equal to 660 [Member] | FICO [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 9,580 $ 6,870
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 81.00% 85.00%
Greater than or equal to 660 [Member] | Installment [Member] | FICO [Member]    
Financing Receivable, Recorded Investment [Line Items]    
2021 and 2020 $ 2,017 $ 1,321
2020 and 2019 665 1,225
2019 and 2018 508 792
2018 and 2017 257 128
2017 and 2016 32 6
2016 1  
Total loans, gross $ 3,480 $ 3,472
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 95.00% 91.00%
Greater than or equal to 660 [Member] | Credit card [Member] | FICO [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 6,100 $ 3,398
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 74.00% 80.00%
Less than 660 [Member] | FICO [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 2,304 $ 1,223
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 19.00% 15.00%
Less than 660 [Member] | Installment [Member] | FICO [Member]    
Financing Receivable, Recorded Investment [Line Items]    
2021 and 2020 $ 42 $ 38
2020 and 2019 40 132
2019 and 2018 61 150
2018 and 2017 42 30
2017 and 2016 7 1
2016 0  
Total loans, gross $ 192 $ 351
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 5.00% 9.00%
Less than 660 [Member] | Credit card [Member] | FICO [Member]    
Financing Receivable, Recorded Investment [Line Items]    
Total loans, gross $ 2,112 $ 872
Percentage concentration of gross installment and credit card loans by refreshed FICO credit score 26.00% 20.00%