Fair Value Level 3 Valuation Inputs (Details) (USD $) In Millions, unless otherwise specified																					12 Months Ended							12 Months Ended													12 Months Ended													12 Months Ended													12 Months Ended																										12 Months Ended																									12 Months Ended								12 Months Ended									12 Months Ended							12 Months Ended								12 Months Ended
	Dec. 31, 2012 Fannie Mae [Member]	Dec. 31, 2011 Fannie Mae [Member]	Dec. 31, 2012 Consolidated Trusts [Member]	Dec. 31, 2011 Consolidated Trusts [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Fannie Mae [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Consolidated Trusts [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Agency [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Alt-A private-label securities [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Alt-A private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Subprime private-label securities [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Subprime private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Mortgage revenue bonds [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Mortgage revenue bonds [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Other [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Other [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Alt-A private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Alt-A private-label securities [Member] Available-for-sale securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Alt-A private-label securities [Member] Available-for-sale securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Alt-A private-label securities [Member] Available-for-sale securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Subprime private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Subprime private-label securities [Member] Trading securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Subprime private-label securities [Member] Trading securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Subprime private-label securities [Member] Trading securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Subprime private-label securities [Member] Available-for-sale securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Subprime private-label securities [Member] Available-for-sale securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Subprime private-label securities [Member] Available-for-sale securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Other [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Other [Member] Available-for-sale securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Other [Member] Available-for-sale securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus with Inputs [Member] Other [Member] Available-for-sale securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus Without Inputs [Member] Agency [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus Without Inputs [Member] Alt-A private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus Without Inputs [Member] Subprime private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consensus Without Inputs [Member] Other [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Dealer Mark [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Alt-A private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Alt-A private-label securities [Member] Trading securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Alt-A private-label securities [Member] Trading securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Alt-A private-label securities [Member] Trading securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Alt-A private-label securities [Member] Available-for-sale securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Alt-A private-label securities [Member] Available-for-sale securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Alt-A private-label securities [Member] Available-for-sale securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Subprime private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Subprime private-label securities [Member] Trading securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Subprime private-label securities [Member] Trading securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Subprime private-label securities [Member] Trading securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Subprime private-label securities [Member] Available-for-sale securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Subprime private-label securities [Member] Available-for-sale securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Subprime private-label securities [Member] Available-for-sale securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Mortgage revenue bonds [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Mortgage revenue bonds [Member] Trading securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Mortgage revenue bonds [Member] Trading securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Mortgage revenue bonds [Member] Trading securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Mortgage revenue bonds [Member] Available-for-sale securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Mortgage revenue bonds [Member] Available-for-sale securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Mortgage revenue bonds [Member] Available-for-sale securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Other [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Other [Member] Available-for-sale securities [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Other [Member] Available-for-sale securities [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Discounted Cash Flow with Inputs [Member] Other [Member] Available-for-sale securities [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Internal Model [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Other Valuation Technique [Member] Agency [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Other Valuation Technique [Member] Subprime private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Other Valuation Technique [Member] Mortgage revenue bonds [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Other Valuation Technique [Member] Other [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Single Vendor Without Inputs [Member] Agency [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Single Vendor Without Inputs [Member] Alt-A private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Single Vendor Without Inputs [Member] Subprime private-label securities [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Single Vendor Without Inputs [Member] Mortgage revenue bonds [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Fannie Mae [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Fannie Mae [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Fannie Mae [Member] Senior Floating [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Fannie Mae [Member] Senior Floating [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Fannie Mae [Member] Discounted Cash Flow without Inputs [Member] Senior Floating [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member]	Dec. 31, 2011 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Consensus with Inputs [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Consensus with Inputs [Member] Long-term debt [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Consensus with Inputs [Member] Long-term debt [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Consensus with Inputs [Member] Long-term debt [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Consensus Without Inputs [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Discounted Cash Flow with Inputs [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Discounted Cash Flow with Inputs [Member] Long-term debt [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Discounted Cash Flow with Inputs [Member] Long-term debt [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Discounted Cash Flow with Inputs [Member] Long-term debt [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single Vendor Without Inputs [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Build-Up [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Build-Up [Member] Mortgage Loans [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Build-Up [Member] Mortgage Loans [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Build-Up [Member] Mortgage Loans [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Consensus with Inputs [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Consensus with Inputs [Member] Mortgage Loans [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Consensus with Inputs [Member] Mortgage Loans [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Consensus with Inputs [Member] Mortgage Loans [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Consensus Without Inputs [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Discounted Cash Flow with Inputs [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Discounted Cash Flow with Inputs [Member] Mortgage Loans [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Discounted Cash Flow with Inputs [Member] Mortgage Loans [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Discounted Cash Flow with Inputs [Member] Mortgage Loans [Member] Weighted Average [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Single-Family [Member] Single Vendor Without Inputs [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Multifamily [Member] Build-Up [Member]	Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Multifamily [Member] Build-Up [Member] Mortgage Loans [Member] Minimum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Multifamily [Member] Build-Up [Member] Mortgage Loans [Member] Maximum [Member]		Dec. 31, 2012 Significant Unobservable Inputs (Level 3) [Member] Recurring Fair Value Measurements [Member] Consolidated Trusts [Member] Multifamily [Member] Build-Up [Member] Mortgage Loans [Member] Weighted Average [Member]
Fair Value Inputs, Quantitative Information [Line Items]
Mortgage loans held for sale, at lower of cost or fair value					$ 208
Default Rate (%)																					0.00%	[1]	17.70%	[1]	3.60%	[1]		10.90%	[1]	23.00%	[1]	16.00%	[1]	0.00%	[1]	27.40%	[1]	15.40%	[1]		0.00%	[1]	5.00%	[1]	4.70%	[1]								5.70%	[1]	17.60%	[1]	12.50%	[1]	0.00%	[1]	23.60%	[1]	6.40%	[1]		14.10%	[1]	20.40%	[1]	18.70%	[1]	0.00%	[1]	24.30%	[1]	15.70%	[1]															4.00%	[1]	10.00%	[1]	5.00%	[1]																				0.00%	[1]	9.00%	[1]	6.20%	[1]			0.00%	[1]	10.00%	[1]	5.80%	[1]				0.10%	[1]	99.30%	[1]	18.40%	[1]		0.00%	[1]	9.00%	[1]	6.40%	[1]			0.00%	[1]	8.50%	[1]	6.00%	[1]
Prepayment Speed (%)																					0.20%	[1]	41.30%	[1]	10.00%	[1]		0.30%	[1]	7.90%	[1]	2.60%	[1]	0.00%	[1]	14.40%	[1]	3.00%	[1]		1.00%	[1]	14.10%	[1]	3.60%	[1]								0.60%	[1]	4.00%	[1]	1.70%	[1]	0.00%	[1]	20.80%	[1]	7.40%	[1]		3.40%	[1]	8.30%	[1]	5.60%	[1]	0.00%	[1]	10.90%	[1]	2.90%	[1]															0.20%	[1]	10.00%	[1]	3.00%	[1]																				1.70%	[1]	14.40%	[1]	10.90%	[1]			0.00%	[1]	100.00%	[1]	36.90%	[1]				4.40%	[1]	92.00%	[1]	19.40%	[1]		1.70%	[1]	14.40%	[1]	10.40%	[1]			1.70%	[1]	14.40%	[1]	5.30%	[1]
Severity (%)																					50.00%	[1]	70.00%	[1]	54.90%	[1]		80.00%	[1]	80.00%	[1]	80.00%	[1]	65.00%	[1]	80.00%	[1]	77.80%	[1]		65.00%	[1]	85.00%	[1]	83.80%	[1]								65.00%	[1]	70.00%	[1]	67.60%	[1]	50.00%	[1]	70.00%	[1]	57.20%	[1]		80.00%	[1]	80.00%	[1]	80.00%	[1]	65.00%	[1]	80.00%	[1]	76.70%	[1]															50.00%	[1]	85.00%	[1]	84.80%	[1]																				65.00%	[1]	70.00%	[1]	67.50%	[1]			50.00%	[1]	70.00%	[1]	63.40%	[1]				5.60%	[1]	97.30%	[1]	33.30%	[1]		65.00%	[1]	70.00%	[1]	67.10%	[1]			65.00%	[1]	70.00%	[1]	65.00%	[1]
Spread (bps)																					3.00%	[1]	6.34%	[1]	4.29%	[1]		4.27%	[1]	6.57%	[1]	4.885%	[1]	3.25%	[1]	6.60%	[1]	4.937%	[1]		4.50%	[1]	7.29%	[1]	5.858%	[1]								5.26%	[1]	6.12%	[1]	5.67%	[1]	2.88%	[1]	6.43%	[1]	4.428%	[1]		4.22%	[1]	6.37%	[1]	5.648%	[1]	2.99%	[1]	6.54%	[1]	5.27%	[1]		2.60%	[1]	3.75%	[1]	3.204%	[1]	0.77%	[1]	3.75%	[1]	2.977%	[1]		4.31%	[1]	11.54%	[1]	5.886%	[1]																				4.68%	[1]	8.51%	[1]	5.843%	[1]			0.98%	[1]	10.30%	[1]	3.314%	[1]											4.68%	[1]	8.51%	[1]	5.679%	[1]			5.07%	[1]	10.30%	[1]	7.334%	[1]			0.77%	[1]	3.634%	[1]	1.545%	[1]
Trading securities					2,286			2,286	4,238	71	[2]	104	345	1,319	1,280	675	724	117	143								544																				44	[2]	17	355			87													236													636																									117	27	[2]		184	39
Available-for-sale securities					25,034			25,034	29,492			6,564	7,256	7,447	7,586	7,837	10,247	3,147	3,445	2,285							3,333													534									1,231	2,326	1,009		3,003													1,710													1,911													916								39	[2]	78	205	688			45		5,721
Mortgage loans held for investment			10,800	3,611	466,594	232,170	234,424																																																																																																												2,634	2,319																	2,459	1,698							302							303	106							50	175
Derivatives								14																																												144																																															(130)
Long-term debt	$ (793)	$ (838)	$ (11,647)	$ (3,939)		$ (1,056)	$ (16,171)	$ (1,528)	$ (1,171)																																																																																																					$ (400)	$ (406)	$ (400)	$ (406)	$ (400)	$ (1,128)	$ (765)	$ (271)							$ (370)	$ (330)							$ (157)

[1] Valuation techniques for which no unobservable inputs are disclosed generally reflect the use of third-party pricing services or dealers, and the range of unobservable inputs applied by these sources is not readily available or cannot be reasonably estimated. Where we have disclosed unobservable inputs for consensus and single vendor techniques, those inputs are based on our validations performed at the security level using discounted cash flows.

[2] Includes Fannie Mae, Freddie Mac and Ginnie Mae securities.