Fair Value Measurements - Carrying and Estimated Fair Value (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Financial assets:
Cash	$ 175		$ 197
Interest bearing deposits with banks	0		1,371
Securities purchased under agreements to resell	6,924		2,160
Securities	0		80
Financial liabilities:
Long-term debt not carried at fair value	20,839		28,426
Derivative related liability	0		22
Level 1 [Member]
Financial assets:
Cash	175		197
Interest bearing deposits with banks			0
Securities purchased under agreements to resell	0		0
Securities			80
Real estate secured:
Total real estate secured receivables	0	[1]	0	[1]
Receivables held for sale	0		0
Due from affiliates	0		0
Financial liabilities:
Due to affiliates carried at fair value	0		0
Due to affiliates not carried at fair value	0		0
Derivative related liability			0
Level 1 [Member] | First Lien [Member]
Real estate secured:
Total real estate secured receivables	0	[1]	0	[1]
Level 1 [Member] | Second Lien [Member]
Real estate secured:
Total real estate secured receivables	0	[1]	0	[1]
Level 2 [Member]
Financial assets:
Cash	0		0
Interest bearing deposits with banks			1,371
Securities purchased under agreements to resell	6,924		2,160
Securities			0
Real estate secured:
Total real estate secured receivables	0	[1]	0	[1]
Receivables held for sale	0		0
Due from affiliates	86		105
Financial liabilities:
Due to affiliates carried at fair value	496		514
Due to affiliates not carried at fair value	8,369		8,654
Derivative related liability			22
Level 2 [Member] | First Lien [Member]
Real estate secured:
Total real estate secured receivables	0	[1]	0	[1]
Level 2 [Member] | Second Lien [Member]
Real estate secured:
Total real estate secured receivables	0	[1]	0	[1]
Level 3 [Member]
Financial assets:
Cash	0		0
Interest bearing deposits with banks			0
Securities purchased under agreements to resell	0		0
Securities			0
Real estate secured:
Total real estate secured receivables	19,995	[1]	20,699	[1]
Receivables held for sale	2,047		6,203
Due from affiliates	0		0
Financial liabilities:
Due to affiliates carried at fair value	0		0
Due to affiliates not carried at fair value	0		0
Derivative related liability			0
Level 3 [Member] | First Lien [Member]
Real estate secured:
Total real estate secured receivables	18,577	[1]	19,586	[1]
Level 3 [Member] | Second Lien [Member]
Real estate secured:
Total real estate secured receivables	1,418	[1]	1,113	[1]
Carrying Value [Member]
Financial assets:
Cash	175		197
Interest bearing deposits with banks			1,371
Securities purchased under agreements to resell	6,924		2,160
Securities			80
Real estate secured:
Total real estate secured receivables	24,173	[1]	29,284	[1]
Receivables held for sale	2,047		6,203
Due from affiliates	86		105
Financial liabilities:
Due to affiliates carried at fair value	496		514
Due to affiliates not carried at fair value	8,246		8,575
Derivative related liability			22
Carrying Value [Member] | First Lien [Member]
Real estate secured:
Total real estate secured receivables	21,514	[1]	26,218	[1]
Carrying Value [Member] | Second Lien [Member]
Real estate secured:
Total real estate secured receivables	2,659	[1]	3,066	[1]
Fair Value [Member]
Financial assets:
Cash	175		197
Interest bearing deposits with banks			1,371
Securities purchased under agreements to resell	6,924		2,160
Securities			80
Real estate secured:
Total real estate secured receivables	19,995	[1]	20,699	[1]
Receivables held for sale	2,047		6,203
Due from affiliates	86		105
Financial liabilities:
Due to affiliates carried at fair value	496		514
Due to affiliates not carried at fair value	8,369		8,654
Derivative related liability			22
Fair Value [Member] | First Lien [Member]
Real estate secured:
Total real estate secured receivables	18,577	[1]	19,586	[1]
Fair Value [Member] | Second Lien [Member]
Real estate secured:
Total real estate secured receivables	1,418	[1]	1,113	[1]
Long-term Debt Carried at Fair Value [Member] | Level 1 [Member]
Financial liabilities:
Long-term debt not carried at fair value	0		0
Long-term Debt Carried at Fair Value [Member] | Level 2 [Member]
Financial liabilities:
Long-term debt not carried at fair value	8,025		9,725
Long-term Debt Carried at Fair Value [Member] | Level 3 [Member]
Financial liabilities:
Long-term debt not carried at fair value	0		0
Long-term Debt Carried at Fair Value [Member] | Carrying Value [Member]
Financial liabilities:
Long-term debt not carried at fair value	8,025		9,725
Long-term Debt Carried at Fair Value [Member] | Fair Value [Member]
Financial liabilities:
Long-term debt not carried at fair value	8,025		9,725
Long Term Debt Not Carried at Fair Value [Member] | Level 1 [Member]
Financial liabilities:
Long-term debt not carried at fair value	0		0
Long Term Debt Not Carried at Fair Value [Member] | Level 2 [Member]
Financial liabilities:
Long-term debt not carried at fair value	11,232		16,537
Long Term Debt Not Carried at Fair Value [Member] | Level 3 [Member]
Financial liabilities:
Long-term debt not carried at fair value	2,069		2,635
Long Term Debt Not Carried at Fair Value [Member] | Carrying Value [Member]
Financial liabilities:
Long-term debt not carried at fair value	12,814		18,701
Long Term Debt Not Carried at Fair Value [Member] | Fair Value [Member]
Financial liabilities:
Long-term debt not carried at fair value	$ 13,301		$ 19,172

[1] The carrying amount of receivables presented in the table above reflects the amortized cost of the receivable, including any accrued interest, less credit loss reserves as well as any charge-offs recorded in accordance with our existing charge-off policies.