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Fair Value Level 3 Valuation Inputs (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2012
Fannie Mae [Member]
Dec. 31, 2011
Fannie Mae [Member]
Jun. 30, 2012
Consolidated Trusts [Member]
Dec. 31, 2011
Consolidated Trusts [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Fannie Mae [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Consolidated Trusts [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consensus with Inputs [Member]
Alt-A private-label securities [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consensus with Inputs [Member]
Subprime private-label securities [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consensus with Inputs [Member]
Other [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consensus Without Inputs [Member]
Alt-A private-label securities [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consensus Without Inputs [Member]
Subprime private-label securities [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consensus Without Inputs [Member]
Other [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Dealer Mark [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Discounted Cash Flow with Inputs [Member]
Alt-A private-label securities [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Discounted Cash Flow with Inputs [Member]
Subprime private-label securities [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Discounted Cash Flow with Inputs [Member]
Mortgage revenue bonds [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Discounted Cash Flow with Inputs [Member]
Other [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Internal Model [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Other Valuation Technique [Member]
Agency [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Other Valuation Technique [Member]
Alt-A private-label securities [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Other Valuation Technique [Member]
Subprime private-label securities [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Other Valuation Technique [Member]
Mortgage revenue bonds [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Other Valuation Technique [Member]
Other [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Single Vendor Without Inputs [Member]
Alt-A private-label securities [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Single Vendor Without Inputs [Member]
Mortgage revenue bonds [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Fannie Mae [Member]
Discounted Cash Flow without Inputs [Member]
Senior Floating [Member]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Consensus with Inputs [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Consensus Without Inputs [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Discounted Cash Flow with Inputs [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Single Vendor Without Inputs [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Single-Family [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Single-Family [Member]
Build-Up [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Single-Family [Member]
Consensus with Inputs [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Single-Family [Member]
Consensus Without Inputs [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Single-Family [Member]
Discounted Cash Flow with Inputs [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Single-Family [Member]
Single Vendor Without Inputs [Member]
Jun. 30, 2012
Significant Unobservable Inputs (Level 3) [Member]
Recurring Fair Value Measurements [Member]
Consolidated Trusts [Member]
Multifamily [Member]
Build-Up [Member]
Jun. 30, 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]
Jun. 30, 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]
Jun. 30, 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]                                                                                                                                                                                                                  
Default Rate (%)                                     0.00% [1] 19.50% [1] 2.80% [1]   10.90% [1] 24.50% [1] 16.50% [1] 0.00% [1] 26.40% [1] 16.40% [1]   5.00% [1] 5.00% [1] 5.00% [1]           7.80% [1] 15.00% [1] 11.70% [1] 0.00% [1] 15.30% [1] 7.40% [1]   15.60% [1] 20.60% [1] 17.50% [1] 0.00% [1] 25.50% [1] 15.90% [1]                 0.40% [1] 13.00% [1] 4.90% [1]                                 2.00% [1] 8.40% [1] 5.60% [1]     1.40% [1] 10.00% [1] 6.10% [1]       0.10% [1] 91.90% [1] 14.50% [1]   2.00% [1] 8.40% [1] 5.60% [1]     1.40% [1] 14.50% [1] 8.60% [1]          
Prepayment Speed (%)                                     0.40% [1] 20.50% [1] 10.50% [1]   0.00% [1] 5.60% [1] 2.60% [1] 0.00% [1] 20.90% [1] 1.80% [1]   3.00% [1] 3.00% [1] 3.00% [1]           0.70% [1] 6.40% [1] 2.70% [1] 0.00% [1] 20.10% [1] 6.00% [1]   0.70% [1] 5.60% [1] 2.60% [1] 0.00% [1] 16.00% [1] 2.40% [1]                 0.00% [1] 10.80% [1] 3.30% [1]                                 2.50% [1] 8.30% [1] 4.50% [1]     0.00% [1] 100.00% [1] 56.00% [1]       9.40% [1] 97.10% [1] 34.10% [1]   2.50% [1] 8.30% [1] 4.60% [1]     0.20% [1] 8.30% [1] 3.60% [1]          
Severity (%)                                     50.00% [1] 70.00% [1] 53.00% [1]   80.00% [1] 80.00% [1] 80.00% [1] 65.00% [1] 80.00% [1] 78.40% [1]   85.00% [1] 85.00% [1] 85.00% [1]           65.00% [1] 70.00% [1] 68.30% [1] 50.00% [1] 70.00% [1] 57.30% [1]   80.00% [1] 80.00% [1] 80.00% [1] 65.00% [1] 80.00% [1] 76.20% [1]                 50.00% [1] 85.00% [1] 84.00% [1]                                 65.00% [1] 70.00% [1] 65.90% [1]     50.00% [1] 65.00% [1] 57.20% [1]       9.40% [1] 100.00% [1] 37.20% [1]   65.00% [1] 70.00% [1] 65.90% [1]     50.00% [1] 65.00% [1] 60.50% [1]          
Spread (bps)                                     3.69% [1] 7.04% [1] 4.987% [1]   6.51% [1] 8.23% [1] 7.004% [1] 5.61% [1] 8.40% [1] 7.026% [1]   6.26% [1] 8.12% [1] 7.061% [1]           6.27% [1] 6.84% [1] 6.479% [1] 4.10% [1] 7.71% [1] 5.733% [1]   6.50% [1] 8.24% [1] 7.746% [1] 5.31% [1] 8.42% [1] 7.13% [1]   2.75% [1] 3.90% [1] 3.354% [1] 1.34% [1] 3.90% [1] 3.203% [1]   5.67% [1] 7.93% [1] 6.76% [1]                                 6.05% [1] 8.66% [1] 6.91% [1]     1.271% [1] 12.69% [1] 4.12% [1]               6.05% [1] 8.66% [1] 6.915% [1]     5.87% [1] 12.69% [1] 6.614% [1]     1.03% [1] 4.234% [1] 1.997% [1]
Trading securities         $ 2,305     $ 2,305 $ 4,238 $ 188 $ 345 $ 1,226 $ 1,280 $ 689 $ 724 $ 118 $ 143         $ 613                       $ 468     $ 125             $ 145             $ 640                       $ 84 [2] $ 63   $ 49 $ 118                                                                            
Available-for-sale securities         26,328     26,328 29,492 6,456 7,256 7,230 7,586 9,353 10,247 3,244 3,445 2,477       3,426             688       1,958 2,043 928   1,711             1,651             1,835             805         45 [2] 84 110 224 823 226 7,294                                                                        
Mortgage loans held for investment     5,231 3,611 523,752 230,096 293,656                                                                                                                                       2,331 2,319                     2,172 1,371       209       333 212       47 159      
Derivatives               74                                                       176                                                   (102)                                                                                      
Long-term debt $ (831) $ (838) $ (4,600) $ (3,939)   $ (1,074) $ (15,864) $ (1,731) $ (1,171)                                                                                                                         $ (412) $ (406) $ (412) $ (406) $ (412) $ (1,319) $ (765) $ (227)       $ (456) $ (490)       $ (146)                                      
[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.
[2] Includes Fannie Mae and Freddie Mac securities.