Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Loans and Leases Receivable, Net Reported Amount	$ 22,945		$ 22,945		$ 10,998
Revenues	836	487	1,376	918
Operating Expenses	292		480
Interest Expense	164	64	246	127
Business Combination, Acquisition Related Costs	16		22
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	264		434
Assets	30,585		30,585		16,197
North America [Member]
Segment Reporting Information [Line Items]
Loans and Leases Receivable, Net Reported Amount	11,968		11,968		10,998
Revenues	588		1,128
Operating Expenses	203		391
Interest Expense	91		173
Financing Receivable, Allowance for Credit Losses, Provisions	81		175
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	213		389
Assets	18,096		18,096
International [Member]
Segment Reporting Information [Line Items]
Loans and Leases Receivable, Net Reported Amount	10,977		10,977
Revenues	248		248
Operating Expenses	89		89
Interest Expense	81		81
Financing Receivable, Allowance for Credit Losses, Provisions	19		19
Business Combination, Acquisition Related Costs	16		22
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	43		37
Assets	12,489		12,489
Corporate [Member]
Segment Reporting Information [Line Items]
Interest Expense	(8)		(8)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	$ 8		$ 8