Finance Receivables and Loans, Net (Commercial Concentration Risk) (Details) - Commercial - Commercial real estate - Geographic Concentration Risk - Financing Receivable	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	100.00%	100.00%
Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	17.60%	17.90%
Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	13.60%	14.90%
California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	7.90%	8.40%
Ohio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	5.90%	4.20%
Michigan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	5.40%	4.20%
North Carolina
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	5.00%	5.30%
New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	4.50%	6.30%
Tennessee
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	3.70%	1.20%
Georgia
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	3.00%	3.10%
Missouri
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	2.80%	2.60%
Other United States
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage	30.60%	31.90%