v3.25.2
LOANS AND LEASES - Schedule of Origination Year (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year $ 2,979.0   $ 2,979.0   $ 5,418.0
Fiscal year before current fiscal year 5,136.0   5,136.0   4,916.0
Two years before current fiscal year 4,670.0   4,670.0   5,924.0
Three years before current fiscal year 5,486.0   5,486.0   5,165.0
Four years before current fiscal year 4,675.0   4,675.0   2,997.0
Prior 8,306.0   8,306.0   6,092.0
Revolving Loans Amortized Cost Basis 3,427.0   3,427.0   3,427.0
Total Loans and Leases 34,679.0 [1] $ 33,757.0 34,679.0 [1] $ 33,757.0 33,939.0 [1]
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Current fiscal year, charge-off     0.1   0.4
Fiscal year before current fiscal year, charge-off     1.2   7.4
Two years before current fiscal year, charge-off     1.5   7.7
Three years before current fiscal year, charge-off     8.4   20.5
Four years before current fiscal year, charge-off     5.7   17.0
Prior, charge-off     25.4   28.8
Revolving Loans Amortized Cost Basis, charge-off     0.0   0.0
Total Loans and Leases, charge-off     42.3   81.8
Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 34,463.0   34,463.0   33,658.0
Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 216.0   216.0   281.0
Total commercial loans and leases          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 1,691.0   1,691.0   3,002.0
Fiscal year before current fiscal year 2,784.0   2,784.0   3,089.0
Two years before current fiscal year 2,975.0   2,975.0   3,571.0
Three years before current fiscal year 3,252.0   3,252.0   2,897.0
Four years before current fiscal year 2,542.0   2,542.0   1,874.0
Prior 5,727.0   5,727.0   4,447.0
Revolving Loans Amortized Cost Basis 2,227.0   2,227.0   2,284.0
Total Loans and Leases 21,198.0   21,198.0   21,164.0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Total Loans and Leases, charge-off 22.3 8.9 35.4 21.0  
Total commercial loans and leases | Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 21,069.0   21,069.0   20,982.0
Total commercial loans and leases | Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 129.0   129.0   182.0
Total commercial loans and leases | Commercial real estate          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 687.0   687.0   1,408.0
Fiscal year before current fiscal year 1,388.0   1,388.0   1,687.0
Two years before current fiscal year 1,740.0   1,740.0   2,321.0
Three years before current fiscal year 2,200.0   2,200.0   2,079.0
Four years before current fiscal year 1,930.0   1,930.0   1,362.0
Prior 4,539.0   4,539.0   3,611.0
Revolving Loans Amortized Cost Basis 202.0   202.0   237.0
Total Loans and Leases 12,686.0   12,686.0   12,705.0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Current fiscal year, charge-off     0.0   0.0
Fiscal year before current fiscal year, charge-off     0.0   0.8
Two years before current fiscal year, charge-off     0.1   1.0
Three years before current fiscal year, charge-off     3.9   15.0
Four years before current fiscal year, charge-off     3.6   10.5
Prior, charge-off     3.0   11.3
Revolving Loans Amortized Cost Basis, charge-off     0.0   0.0
Total Loans and Leases, charge-off 3.0 3.2 10.6 10.3 38.6
Total commercial loans and leases | Commercial real estate | Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 12,631.0   12,631.0   12,591.0
Total commercial loans and leases | Commercial real estate | Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 55.0   55.0   114.0
Total commercial loans and leases | Commercial real estate | Pass          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 634.0   634.0   1,405.0
Fiscal year before current fiscal year 1,373.0   1,373.0   1,661.0
Two years before current fiscal year 1,714.0   1,714.0   2,025.0
Three years before current fiscal year 1,948.0   1,948.0   1,984.0
Four years before current fiscal year 1,749.0   1,749.0   1,200.0
Prior 4,099.0   4,099.0   3,235.0
Revolving Loans Amortized Cost Basis 196.0   196.0   197.0
Total Loans and Leases 11,713.0   11,713.0   11,707.0
Total commercial loans and leases | Commercial real estate | Special Mention          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 53.0   53.0   1.0
Fiscal year before current fiscal year 13.0   13.0   10.0
Two years before current fiscal year 18.0   18.0   177.0
Three years before current fiscal year 194.0   194.0   52.0
Four years before current fiscal year 129.0   129.0   107.0
Prior 219.0   219.0   181.0
Revolving Loans Amortized Cost Basis 3.0   3.0   37.0
Total Loans and Leases 629.0   629.0   565.0
Total commercial loans and leases | Commercial real estate | Substandard          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 0.0   0.0   2.0
Fiscal year before current fiscal year 2.0   2.0   16.0
Two years before current fiscal year 8.0   8.0   119.0
Three years before current fiscal year 58.0   58.0   43.0
Four years before current fiscal year 52.0   52.0   55.0
Prior 221.0   221.0   195.0
Revolving Loans Amortized Cost Basis 3.0   3.0   3.0
Total Loans and Leases 344.0   344.0   433.0
Total commercial loans and leases | Commercial and industrial          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 823.0   823.0   1,251.0
Fiscal year before current fiscal year 1,157.0   1,157.0   1,149.0
Two years before current fiscal year 1,001.0   1,001.0   1,142.0
Three years before current fiscal year 962.0   962.0   754.0
Four years before current fiscal year 559.0   559.0   481.0
Prior 1,132.0   1,132.0   791.0
Revolving Loans Amortized Cost Basis 1,922.0   1,922.0   1,982.0
Total Loans and Leases 7,556.0   7,556.0   7,550.0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Current fiscal year, charge-off     0.1   0.1
Fiscal year before current fiscal year, charge-off     0.5   3.9
Two years before current fiscal year, charge-off     0.3   1.5
Three years before current fiscal year, charge-off     3.1   1.8
Four years before current fiscal year, charge-off     0.7   6.0
Prior, charge-off     17.7   7.6
Revolving Loans Amortized Cost Basis, charge-off     0.0   0.0
Total Loans and Leases, charge-off 18.1 4.7 22.4 8.6 20.9
Total commercial loans and leases | Commercial and industrial | Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 7,489.0   7,489.0   7,488.0
Total commercial loans and leases | Commercial and industrial | Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 67.0   67.0   62.0
Total commercial loans and leases | Commercial and industrial | Pass          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 813.0   813.0   1,241.0
Fiscal year before current fiscal year 1,144.0   1,144.0   1,079.0
Two years before current fiscal year 927.0   927.0   1,074.0
Three years before current fiscal year 925.0   925.0   647.0
Four years before current fiscal year 509.0   509.0   461.0
Prior 1,015.0   1,015.0   669.0
Revolving Loans Amortized Cost Basis 1,719.0   1,719.0   1,861.0
Total Loans and Leases 7,052.0   7,052.0   7,032.0
Total commercial loans and leases | Commercial and industrial | Special Mention          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 9.0   9.0   6.0
Fiscal year before current fiscal year 6.0   6.0   20.0
Two years before current fiscal year 24.0   24.0   57.0
Three years before current fiscal year 25.0   25.0   74.0
Four years before current fiscal year 32.0   32.0   12.0
Prior 74.0   74.0   63.0
Revolving Loans Amortized Cost Basis 129.0   129.0   41.0
Total Loans and Leases 299.0   299.0   273.0
Total commercial loans and leases | Commercial and industrial | Substandard          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 1.0   1.0   4.0
Fiscal year before current fiscal year 7.0   7.0   50.0
Two years before current fiscal year 50.0   50.0   11.0
Three years before current fiscal year 12.0   12.0   33.0
Four years before current fiscal year 18.0   18.0   8.0
Prior 43.0   43.0   59.0
Revolving Loans Amortized Cost Basis 74.0   74.0   80.0
Total Loans and Leases 205.0   205.0   245.0
Total commercial loans and leases | Commercial leases          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 170.0   170.0   331.0
Fiscal year before current fiscal year 239.0   239.0   191.0
Two years before current fiscal year 171.0   171.0   108.0
Three years before current fiscal year 90.0   90.0   64.0
Four years before current fiscal year 53.0   53.0   31.0
Prior 51.0   51.0   40.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 774.0   774.0   765.0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Current fiscal year, charge-off     0.0   0.0
Fiscal year before current fiscal year, charge-off     0.0   0.0
Two years before current fiscal year, charge-off     0.0   0.0
Three years before current fiscal year, charge-off     0.0   0.0
Four years before current fiscal year, charge-off     0.0   0.0
Prior, charge-off     0.2   0.3
Revolving Loans Amortized Cost Basis, charge-off     0.0   0.0
Total Loans and Leases, charge-off 0.1 0.0 0.2 0.2 0.3
Total commercial loans and leases | Commercial leases | Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 771.0   771.0   762.0
Total commercial loans and leases | Commercial leases | Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 3.0   3.0   3.0
Total commercial loans and leases | Commercial leases | Pass          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 169.0   169.0   331.0
Fiscal year before current fiscal year 234.0   234.0   184.0
Two years before current fiscal year 160.0   160.0   106.0
Three years before current fiscal year 88.0   88.0   60.0
Four years before current fiscal year 50.0   50.0   26.0
Prior 46.0   46.0   39.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 747.0   747.0   746.0
Total commercial loans and leases | Commercial leases | Special Mention          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 1.0   1.0   0.0
Fiscal year before current fiscal year 5.0   5.0   1.0
Two years before current fiscal year 6.0   6.0   0.0
Three years before current fiscal year 0.0   0.0   0.0
Four years before current fiscal year 0.0   0.0   0.0
Prior 5.0   5.0   1.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 17.0   17.0   2.0
Total commercial loans and leases | Commercial leases | Substandard          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 0.0   0.0   0.0
Fiscal year before current fiscal year 0.0   0.0   6.0
Two years before current fiscal year 5.0   5.0   2.0
Three years before current fiscal year 2.0   2.0   4.0
Four years before current fiscal year 3.0   3.0   5.0
Prior 0.0   0.0   0.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 10.0   10.0   17.0
Total commercial loans and leases | Other          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 11.0   11.0   12.0
Fiscal year before current fiscal year 0.0   0.0   62.0
Two years before current fiscal year 63.0   63.0   0.0
Three years before current fiscal year 0.0   0.0   0.0
Four years before current fiscal year 0.0   0.0   0.0
Prior 5.0   5.0   5.0
Revolving Loans Amortized Cost Basis 103.0   103.0   65.0
Total Loans and Leases 182.0   182.0   144.0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Current fiscal year, charge-off     0.0   0.0
Fiscal year before current fiscal year, charge-off     0.0   0.0
Two years before current fiscal year, charge-off     0.0   0.0
Three years before current fiscal year, charge-off     0.0   0.0
Four years before current fiscal year, charge-off     0.0   0.0
Prior, charge-off     2.2   4.2
Revolving Loans Amortized Cost Basis, charge-off     0.0   0.0
Total Loans and Leases, charge-off 1.1 1.0 2.2 1.9 4.2
Total commercial loans and leases | Other | Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 178.0   178.0   141.0
Total commercial loans and leases | Other | Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 4.0   4.0   3.0
Total commercial loans and leases | Other | Pass          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 11.0   11.0   12.0
Fiscal year before current fiscal year 0.0   0.0   62.0
Two years before current fiscal year 63.0   63.0   0.0
Three years before current fiscal year 0.0   0.0   0.0
Four years before current fiscal year 0.0   0.0   0.0
Prior 5.0   5.0   5.0
Revolving Loans Amortized Cost Basis 103.0   103.0   65.0
Total Loans and Leases 182.0   182.0   144.0
Total consumer loans          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 1,288.0   1,288.0   2,416.0
Fiscal year before current fiscal year 2,352.0   2,352.0   1,827.0
Two years before current fiscal year 1,695.0   1,695.0   2,353.0
Three years before current fiscal year 2,234.0   2,234.0   2,268.0
Four years before current fiscal year 2,133.0   2,133.0   1,123.0
Prior 2,579.0   2,579.0   1,645.0
Revolving Loans Amortized Cost Basis 1,200.0   1,200.0   1,143.0
Total Loans and Leases 13,481.0   13,481.0   12,775.0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Total Loans and Leases, charge-off 3.6 3.4 6.9 6.8  
Total consumer loans | Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 13,394.0   13,394.0   12,676.0
Total consumer loans | Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Total Loans and Leases 87.0   87.0   99.0
Total consumer loans | Direct installment          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 216.0   216.0   346.0
Fiscal year before current fiscal year 313.0   313.0   278.0
Two years before current fiscal year 248.0   248.0   624.0
Three years before current fiscal year 581.0   581.0   684.0
Four years before current fiscal year 639.0   639.0   342.0
Prior 674.0   674.0   402.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 2,671.0   2,671.0   2,676.0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Current fiscal year, charge-off     0.0   0.0
Fiscal year before current fiscal year, charge-off     0.1   0.2
Two years before current fiscal year, charge-off     0.2   0.3
Three years before current fiscal year, charge-off     0.1   0.2
Four years before current fiscal year, charge-off     0.0   0.0
Prior, charge-off     0.2   1.1
Revolving Loans Amortized Cost Basis, charge-off     0.0   0.0
Total Loans and Leases, charge-off 0.2 0.4 0.6 0.6 1.8
Total consumer loans | Direct installment | Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 216.0   216.0   346.0
Fiscal year before current fiscal year 312.0   312.0   277.0
Two years before current fiscal year 247.0   247.0   621.0
Three years before current fiscal year 580.0   580.0   683.0
Four years before current fiscal year 638.0   638.0   341.0
Prior 669.0   669.0   396.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 2,662.0   2,662.0   2,664.0
Total consumer loans | Direct installment | Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 0.0   0.0   0.0
Fiscal year before current fiscal year 1.0   1.0   1.0
Two years before current fiscal year 1.0   1.0   3.0
Three years before current fiscal year 1.0   1.0   1.0
Four years before current fiscal year 1.0   1.0   1.0
Prior 5.0   5.0   6.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 9.0   9.0   12.0
Total consumer loans | Residential mortgages          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 874.0   874.0   1,665.0
Fiscal year before current fiscal year 1,698.0   1,698.0   1,493.0
Two years before current fiscal year 1,401.0   1,401.0   1,604.0
Three years before current fiscal year 1,547.0   1,547.0   1,422.0
Four years before current fiscal year 1,374.0   1,374.0   729.0
Prior 1,701.0   1,701.0   1,073.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 8,595.0   8,595.0   7,986.0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Current fiscal year, charge-off     0.0   0.1
Fiscal year before current fiscal year, charge-off     0.2   0.6
Two years before current fiscal year, charge-off     0.3   0.3
Three years before current fiscal year, charge-off     0.1   0.2
Four years before current fiscal year, charge-off     0.2   0.0
Prior, charge-off     1.0   1.4
Revolving Loans Amortized Cost Basis, charge-off     0.0   0.0
Total Loans and Leases, charge-off 1.4 0.2 1.8 0.2 2.6
Total consumer loans | Residential mortgages | Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 872.0   872.0   1,663.0
Fiscal year before current fiscal year 1,691.0   1,691.0   1,478.0
Two years before current fiscal year 1,391.0   1,391.0   1,598.0
Three years before current fiscal year 1,542.0   1,542.0   1,417.0
Four years before current fiscal year 1,369.0   1,369.0   728.0
Prior 1,677.0   1,677.0   1,048.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 8,542.0   8,542.0   7,932.0
Total consumer loans | Residential mortgages | Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 2.0   2.0   2.0
Fiscal year before current fiscal year 7.0   7.0   15.0
Two years before current fiscal year 10.0   10.0   6.0
Three years before current fiscal year 5.0   5.0   5.0
Four years before current fiscal year 5.0   5.0   1.0
Prior 24.0   24.0   25.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 53.0   53.0   54.0
Total consumer loans | Indirect installment          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 194.0   194.0   397.0
Fiscal year before current fiscal year 334.0   334.0   27.0
Two years before current fiscal year 22.0   22.0   73.0
Three years before current fiscal year 59.0   59.0   148.0
Four years before current fiscal year 107.0   107.0   51.0
Prior 64.0   64.0   43.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 780.0   780.0   739.0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Current fiscal year, charge-off     0.0   0.2
Fiscal year before current fiscal year, charge-off     0.4   1.8
Two years before current fiscal year, charge-off     0.6   4.5
Three years before current fiscal year, charge-off     1.2   3.2
Four years before current fiscal year, charge-off     1.2   0.5
Prior, charge-off     0.5   1.6
Revolving Loans Amortized Cost Basis, charge-off     0.0   0.0
Total Loans and Leases, charge-off 1.7 2.5 3.9 5.4 11.8
Total consumer loans | Indirect installment | Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 193.0   193.0   396.0
Fiscal year before current fiscal year 332.0   332.0   24.0
Two years before current fiscal year 21.0   21.0   67.0
Three years before current fiscal year 54.0   54.0   142.0
Four years before current fiscal year 103.0   103.0   49.0
Prior 63.0   63.0   42.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 766.0   766.0   720.0
Total consumer loans | Indirect installment | Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 1.0   1.0   1.0
Fiscal year before current fiscal year 2.0   2.0   3.0
Two years before current fiscal year 1.0   1.0   6.0
Three years before current fiscal year 5.0   5.0   6.0
Four years before current fiscal year 4.0   4.0   2.0
Prior 1.0   1.0   1.0
Revolving Loans Amortized Cost Basis 0.0   0.0   0.0
Total Loans and Leases 14.0   14.0   19.0
Total consumer loans | Consumer lines of credit          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 4.0   4.0   8.0
Fiscal year before current fiscal year 7.0   7.0   29.0
Two years before current fiscal year 24.0   24.0   52.0
Three years before current fiscal year 47.0   47.0   14.0
Four years before current fiscal year 13.0   13.0   1.0
Prior 140.0   140.0   127.0
Revolving Loans Amortized Cost Basis 1,200.0   1,200.0   1,143.0
Total Loans and Leases 1,435.0   1,435.0   1,374.0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract]          
Current fiscal year, charge-off     0.0   0.0
Fiscal year before current fiscal year, charge-off     0.0   0.1
Two years before current fiscal year, charge-off     0.0   0.1
Three years before current fiscal year, charge-off     0.0   0.1
Four years before current fiscal year, charge-off     0.0   0.0
Prior, charge-off     0.6   1.3
Revolving Loans Amortized Cost Basis, charge-off     0.0   0.0
Total Loans and Leases, charge-off 0.3 $ 0.3 0.6 $ 0.6 1.6
Total consumer loans | Consumer lines of credit | Current          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 4.0   4.0   8.0
Fiscal year before current fiscal year 7.0   7.0   29.0
Two years before current fiscal year 24.0   24.0   51.0
Three years before current fiscal year 46.0   46.0   13.0
Four years before current fiscal year 12.0   12.0   1.0
Prior 133.0   133.0   117.0
Revolving Loans Amortized Cost Basis 1,198.0   1,198.0   1,141.0
Total Loans and Leases 1,424.0   1,424.0   1,360.0
Total consumer loans | Consumer lines of credit | Past due          
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]          
Current fiscal year 0.0   0.0   0.0
Fiscal year before current fiscal year 0.0   0.0   0.0
Two years before current fiscal year 0.0   0.0   1.0
Three years before current fiscal year 1.0   1.0   1.0
Four years before current fiscal year 1.0   1.0   0.0
Prior 7.0   7.0   10.0
Revolving Loans Amortized Cost Basis 2.0   2.0   2.0
Total Loans and Leases $ 11.0   $ 11.0   $ 14.0
[1] Amount represents loans for which we have elected the fair value option. See Note 18.