Expected Loss to be Paid - Net Expected Recoveries from Breaches of R&W Rollforward (Details) - RMBS [Member] - United States [Member] - USD ($) $ in Millions		Mar. 31, 2016	Dec. 31, 2015
Schedule of Expected Losses to be Paid [Line Items]
Future net R&W benefit	[1]	$ 47	$ 79
First Lien [Member]
Schedule of Expected Losses to be Paid [Line Items]
Future net R&W benefit	[1]	(30)	0
Second Lien [Member]
Schedule of Expected Losses to be Paid [Line Items]
Future net R&W benefit	[1]	$ 77	$ 79

[1] The Company’s agreements with providers of breaches of R&W generally provide for reimbursement to the Company as claim payments are made and, to the extent the Company later receives reimbursements of such claims from excess spread or other sources, for the Company to provide reimbursement to the R&W providers. See the section “Breaches of Representations and Warranties” for information about the R&W agreements and eligible assets held in trust with respect to such agreements. When the Company projects receiving more reimbursements in the future than it projects to pay in claims, the Company will have a net R&W payable