Mortgage Loans Credit Quality Indicators - SF (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total recorded investment	$ 3,662,711	$ 3,336,929
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	3,659,247	3,336,405
Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		2,989,182
Estimated mark-to-market loan-to-value ratio less than or equal to 80% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		2,603,619
Estimated mark-to-market loan-to-value ratio greater than 80% and less than or equal to 90% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		246,326
Estimated mark-to-market loan-to-value ratio greater than 90% and less than or equal to 100% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		133,049
Estimated mark-to-market LTV ratio greater than 100% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		6,188
Fixed Rate Residential Mortgage [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		2,517,547
Fixed Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio less than or equal to 80% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		2,145,018
Fixed Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio greater than 80% and less than or equal to 90% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		237,623
Fixed Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio greater than 90% and less than or equal to 100% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		130,152
Fixed Rate Residential Mortgage [Member] | Estimated mark-to-market LTV ratio greater than 100% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		4,754
FixedRateResidentialMortgage15yearMember [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		374,087
FixedRateResidentialMortgage15yearMember [Member] | Estimated mark-to-market loan-to-value ratio less than or equal to 80% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		368,181
FixedRateResidentialMortgage15yearMember [Member] | Estimated mark-to-market loan-to-value ratio greater than 80% and less than or equal to 90% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		4,556
FixedRateResidentialMortgage15yearMember [Member] | Estimated mark-to-market loan-to-value ratio greater than 90% and less than or equal to 100% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		1,284
FixedRateResidentialMortgage15yearMember [Member] | Estimated mark-to-market LTV ratio greater than 100% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		66
Adjustable Rate Residential Mortgage [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		44,908
Adjustable Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio less than or equal to 80% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		43,415
Adjustable Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio greater than 80% and less than or equal to 90% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		1,275
Adjustable Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio greater than 90% and less than or equal to 100% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		215
Adjustable Rate Residential Mortgage [Member] | Estimated mark-to-market LTV ratio greater than 100% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		3
Other [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		52,640
Other [Member] | Estimated mark-to-market loan-to-value ratio less than or equal to 80% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		47,005
Other [Member] | Estimated mark-to-market loan-to-value ratio greater than 80% and less than or equal to 90% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		2,872
Other [Member] | Estimated mark-to-market loan-to-value ratio greater than 90% and less than or equal to 100% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		1,398
Other [Member] | Estimated mark-to-market LTV ratio greater than 100% [Member] | Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)		1,365
Single-Family [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total recorded investment	3,285,285	3,006,311
Financing Receivable, Year One, Originated, Current Fiscal Year	1,253,449
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	367,647
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	178,798
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	226,092
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	272,831
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	972,993
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	3,271,810
Single-Family [Member] | Estimated mark-to-market loan-to-value ratio less than or equal to 80% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	978,509
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	277,248
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	154,357
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	220,388
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	270,966
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	960,696
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	2,862,164
Single-Family [Member] | Estimated mark-to-market loan-to-value ratio greater than 80% and less than or equal to 90% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	163,839
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	86,192
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	23,574
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	5,346
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,635
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	7,288
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	287,874
Single-Family [Member] | Estimated mark-to-market loan-to-value ratio greater than 90% and less than or equal to 100% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	111,073
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	4,200
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	832
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	270
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	137
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,608
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	119,120
Single-Family [Member] | Estimated Mark To Market Loan To Value Ratio Greater Than 100 Percent, Loans Recorded Investment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	28
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	7
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	35
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	88
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	93
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,401
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	2,652
Single-Family [Member] | Fixed Rate Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total recorded investment	2,742,203	2,517,547
Financing Receivable, Year One, Originated, Current Fiscal Year	1,061,427
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	323,414
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	160,137
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	188,912
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	222,969
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	785,344
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	2,742,203
Single-Family [Member] | Fixed Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio less than or equal to 80% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	794,156
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	233,994
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	135,849
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	183,315
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	221,172
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	775,636
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	2,344,122
Single-Family [Member] | Fixed Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio greater than 80% and less than or equal to 90% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	157,500
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	85,227
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	23,440
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	5,270
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,592
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	5,958
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	278,987
Single-Family [Member] | Fixed Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio greater than 90% and less than or equal to 100% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	109,743
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	4,186
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	820
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	250
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	124
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,994
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	117,117
Single-Family [Member] | Fixed Rate Residential Mortgage [Member] | Estimated Mark To Market Loan To Value Ratio Greater Than 100 Percent, Loans Recorded Investment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	28
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	7
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	28
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	77
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	81
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,756
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	1,977
Single-Family [Member] | FixedRateResidentialMortgage15yearMember [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total recorded investment	457,059	374,087
Financing Receivable, Year One, Originated, Current Fiscal Year	188,797
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	42,194
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	15,809
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	31,518
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	46,102
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	132,639
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	457,059
Single-Family [Member] | FixedRateResidentialMortgage15yearMember [Member] | Estimated mark-to-market loan-to-value ratio less than or equal to 80% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	181,418
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	41,374
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	15,768
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	31,497
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	46,088
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	132,596
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	448,741
Single-Family [Member] | FixedRateResidentialMortgage15yearMember [Member] | Estimated mark-to-market loan-to-value ratio greater than 80% and less than or equal to 90% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	6,105
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	811
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	35
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	14
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	8
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	20
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	6,993
Single-Family [Member] | FixedRateResidentialMortgage15yearMember [Member] | Estimated mark-to-market loan-to-value ratio greater than 90% and less than or equal to 100% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,274
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	9
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	3
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	10
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	1,303
Single-Family [Member] | FixedRateResidentialMortgage15yearMember [Member] | Estimated Mark To Market Loan To Value Ratio Greater Than 100 Percent, Loans Recorded Investment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	3
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	13
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	22
Single-Family [Member] | Adjustable Rate Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total recorded investment	31,441	44,908
Financing Receivable, Year One, Originated, Current Fiscal Year	3,225
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,994
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,492
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,784
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,683
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	16,263
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	31,441
Single-Family [Member] | Adjustable Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio less than or equal to 80% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	2,935
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,839
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,412
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,765
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,678
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	16,248
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	30,877
Single-Family [Member] | Adjustable Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio greater than 80% and less than or equal to 90% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	234
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	152
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	79
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	19
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	5
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	12
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	501
Single-Family [Member] | Adjustable Rate Residential Mortgage [Member] | Estimated mark-to-market loan-to-value ratio greater than 90% and less than or equal to 100% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	56
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	3
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	62
Single-Family [Member] | Adjustable Rate Residential Mortgage [Member] | Estimated Mark To Market Loan To Value Ratio Greater Than 100 Percent, Loans Recorded Investment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	1
Single-Family [Member] | Other [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total recorded investment	54,582	69,769
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	45
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	360
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	878
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,077
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	38,747
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	41,107
Single-Family [Member] | Other [Member] | Estimated mark-to-market loan-to-value ratio less than or equal to 80% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	41
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	328
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	811
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,028
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	36,216
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	38,424
Single-Family [Member] | Other [Member] | Estimated mark-to-market loan-to-value ratio greater than 80% and less than or equal to 90% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	20
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	43
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	30
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,298
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	1,393
Single-Family [Member] | Other [Member] | Estimated mark-to-market loan-to-value ratio greater than 90% and less than or equal to 100% [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	8
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	16
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	10
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	602
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	638
Single-Family [Member] | Other [Member] | Estimated Mark To Market Loan To Value Ratio Greater Than 100 Percent, Loans Recorded Investment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	4
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	8
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	631
Financing Receivable, before Allowance for Credit Loss (includes $6,490 and $7,825, respectively, at fair value)	652
Single-Family [Member] | Government [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total recorded investment	$ 13,500	$ 17,100