v3.26.1
Derivatives and Hedging Activities (Derivatives in Statement of Income) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Advances $ 379 $ 473
AFS securities 235 268
Bonds (389) (594)
Discount notes (204) (126)
Advances | Location, Statement of Income, Balance [Axis]: us-gaap:InterestIncomeExpenseNet | Interest Rate Contract    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments 53 (64)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge (44) 102
Net Gains Losses On Qualifying Active Fair Value Hedging Relationships 9 38
Available-for-sale Securities | Location, Statement of Income, Balance [Axis]: us-gaap:InterestIncomeExpenseNet | Interest Rate Contract    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments 130 (218)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge (109) 275
Net Gains Losses On Qualifying Active Fair Value Hedging Relationships 21 57
Consolidated Obligations, Bonds | Location, Statement of Income, Balance [Axis]: us-gaap:InterestIncomeExpenseNet | Interest Rate Contract    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments (37) 44
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 10 (100)
Net Gains Losses On Qualifying Active Fair Value Hedging Relationships (27) (56)
Discount notes | Location, Statement of Income, Balance [Axis]: us-gaap:InterestIncomeExpenseNet | Interest Rate Contract    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments (2) (2)
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge 3 4
Net Gains Losses On Qualifying Active Fair Value Hedging Relationships $ 1 $ 2