Receivables Held for Sale - Summary of Activity in Receivables Held for Sale (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013		Dec. 31, 2013		Dec. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward]
Receivables held for sale at beginning of period	$ 6,203	[1]	$ 6,203	[1]	$ 0
Lower of amortized cost or fair value adjustment on receivables held for sale			748		18
Carrying value of real estate secured receivables held for sale settled through short sale or transfer to REO			711		264
Change in receivable balance, including collections			(249)		(307)
Transfer of first lien real estate secured into held for sale at the lower of amortized cost or fair value			2,130	[2]	6,756	[2]
Receivables held for sale at end of period			2,047	[1]	6,203	[1]
First Lien [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Receivable sales			(3,127)
Mortgage Loans on Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Receivables held for sale at beginning of period	3,022	[1]	3,022	[1]	0
Lower of amortized cost or fair value adjustment on receivables held for sale			830		(3)
Carrying value of real estate secured receivables held for sale settled through short sale or transfer to REO			711		264
Change in receivable balance, including collections			(97)		2
Transfer of first lien real estate secured into held for sale at the lower of amortized cost or fair value			2,130	[2]	3,287	[2]
Receivables held for sale at end of period			2,047	[1]	3,022	[1]
Mortgage Loans on Real Estate [Member] | First Lien [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Receivable sales			(3,127)
Personal non-credit card [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Receivables held for sale at beginning of period	3,181	[1]	3,181	[1]	0
Receivable sales			(2,947)
Lower of amortized cost or fair value adjustment on receivables held for sale	(82)		(82)		21
Carrying value of real estate secured receivables held for sale settled through short sale or transfer to REO			0		0
Change in receivable balance, including collections			(152)		(309)
Transfer of first lien real estate secured into held for sale at the lower of amortized cost or fair value			0	[2]	3,469	[2]
Receivables held for sale at end of period			$ 0	[1]	$ 3,181	[1]

[1] Net of a valuation allowance of $329 million and $1,452 million at December 31, 2013 and December 31, 2012, respectively. The following table provides a rollforward of our valuation allowance for 2013 and 2012:

[2] The lower of amortized cost or fair value adjustment on receivables transferred into held for sale during 2013 and 2012 totaled $212 million and $1,659 million, respectively, including the credit component recorded in the provision for credit losses for the personal non-credit card receivables transferred to held for sale during 2012.