Estimated Fair Values (Estimated Fair Value Measurements on a Recurring Basis) (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019 |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | $ 1,563 | $ 1,558 |
Assets: | | | |
Available-for-sale Securities | | 0 | 684 |
Derivative assets | | 440 | 380 |
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | [1],[2] | 413 | 304 |
Liabilities: | | | |
Derivative liabilities | | 9 | 7 |
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset | [1],[2] | (571) | (215) |
Mortgage-backed Securities, Issued by Private Enterprises [Member] | | | |
Assets: | | | |
Available-for-sale Securities | | 0 | 684 |
US Treasury Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 1,501 | 1,499 |
Government-Sponsored Enterprises Debt Obligations [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 62 | 59 |
Fair Value, Inputs, Level 1 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 0 | 0 |
Assets: | | | |
Available-for-sale Securities | | | 0 |
Derivative assets | | 0 | 0 |
Grantor trust assets (included in Other assets) | | 71 | 68 |
Liabilities: | | | |
Derivative liabilities | | 0 | 0 |
Fair Value, Inputs, Level 2 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 1,563 | 1,558 |
Assets: | | | |
Available-for-sale Securities | | | 0 |
Derivative assets | | 27 | 76 |
Grantor trust assets (included in Other assets) | | 0 | 0 |
Liabilities: | | | |
Derivative liabilities | | 580 | 222 |
Fair Value, Inputs, Level 3 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 0 | 0 |
Assets: | | | |
Available-for-sale Securities | | | 684 |
Derivative assets | | 0 | 0 |
Grantor trust assets (included in Other assets) | | 0 | 0 |
Liabilities: | | | |
Derivative liabilities | | 0 | 0 |
Fair Value, Recurring [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 0 | 0 |
Assets: | | | |
Available-for-sale Securities | | | 0 |
Derivative, Collateral, Right to Reclaim Cash | [1] | 413 | 304 |
Grantor trust assets (included in Other assets) | | 0 | 0 |
Liabilities: | | | |
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset | [1] | (571) | (215) |
Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | | | |
Assets: | | | |
Available-for-sale Securities | | | 0 |
Fair Value, Recurring [Member] | US Treasury Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 0 | 0 |
Fair Value, Recurring [Member] | Government-Sponsored Enterprises Debt Obligations [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 0 | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 0 | 0 |
Assets: | | | |
Grantor trust assets (included in Other assets) | | 71 | 68 |
Total recurring assets at fair value | | 71 | 68 |
Liabilities: | | | |
Total recurring liabilities at fair value | | 0 | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | | | |
Assets: | | | |
Available-for-sale Securities | | | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 0 | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Government-Sponsored Enterprises Debt Obligations [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 0 | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 1,563 | 1,558 |
Assets: | | | |
Grantor trust assets (included in Other assets) | | 0 | 0 |
Total recurring assets at fair value | | 1,590 | 1,634 |
Liabilities: | | | |
Total recurring liabilities at fair value | | 580 | 222 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | | | |
Assets: | | | |
Available-for-sale Securities | | | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 1,501 | 1,499 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Government-Sponsored Enterprises Debt Obligations [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 62 | 59 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 0 | 0 |
Assets: | | | |
Grantor trust assets (included in Other assets) | | 0 | 0 |
Total recurring assets at fair value | | 0 | 684 |
Liabilities: | | | |
Total recurring liabilities at fair value | | 0 | 0 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | | | |
Assets: | | | |
Available-for-sale Securities | | | 684 |
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Government-Sponsored Enterprises Debt Obligations [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 0 | 0 |
Interest-rate swaps [Member] | Fair Value, Recurring [Member] | | | |
Assets: | | | |
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset | | 413 | 304 |
Liabilities: | | | |
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset | | (571) | (215) |
Interest-rate swaps [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | | | |
Assets: | | | |
Derivative assets | | 0 | 0 |
Liabilities: | | | |
Derivative liabilities | | 0 | 0 |
Interest-rate swaps [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | | | |
Assets: | | | |
Derivative assets | | 27 | 76 |
Liabilities: | | | |
Derivative liabilities | | 580 | 222 |
Interest-rate swaps [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | | | |
Assets: | | | |
Derivative assets | | 0 | 0 |
Liabilities: | | | |
Derivative liabilities | | 0 | 0 |
Estimate of Fair Value Measurement [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 1,563 | 1,558 |
Assets: | | | |
Available-for-sale Securities | | | 684 |
Derivative assets | | 440 | 380 |
Grantor trust assets (included in Other assets) | | 71 | 68 |
Liabilities: | | | |
Derivative liabilities | | 9 | 7 |
Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 1,563 | 1,558 |
Assets: | | | |
Grantor trust assets (included in Other assets) | | 71 | 68 |
Total recurring assets at fair value | | 2,074 | 2,690 |
Liabilities: | | | |
Total recurring liabilities at fair value | | 9 | 7 |
Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member] | Mortgage-backed Securities, Issued by Private Enterprises [Member] | | | |
Assets: | | | |
Available-for-sale Securities | | | 684 |
Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 1,501 | 1,499 |
Estimate of Fair Value Measurement [Member] | Fair Value, Recurring [Member] | Government-Sponsored Enterprises Debt Obligations [Member] | | | |
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] | | | |
Trading Securities | | 62 | 59 |
Estimate of Fair Value Measurement [Member] | Interest-rate swaps [Member] | Fair Value, Recurring [Member] | | | |
Assets: | | | |
Derivative assets | | 440 | 380 |
Liabilities: | | | |
Derivative liabilities | | $ 9 | $ 7 |
| |
[1] | Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty. | |
[2] | Amounts represent the application of the netting requirements that allow the Bank to settle positive and negative positions, and also cash collateral and related accrued interest held or placed with the same clearing agents and/or counterparty. Cash collateral posted, including accrued interest was $984 and $543 as of September 30, 2020 and December 31, 2019, respectively. Cash collateral received, including accrued interest was $0 and $25 as of September 30, 2020 and December 31, 2019, respectively. | |