v3.26.1
Derivative and Hedging Activities - Schedule of Derivatives Subject to a Master Netting Arrangement (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivatives designated as hedging instruments: | Interest rate swaps    
Assets    
Gross Amounts Not Offset in the Statements of Condition   $ 0
Cash Collateral Pledged (Received)   76
Derivatives designated as hedging instruments: | Interest rate swaps | Interest rate swaps    
Assets    
Gross Amounts Not Offset in the Statements of Condition $ 0  
Cash Collateral Pledged (Received) 65  
Derivatives not designated as hedging instruments:    
Assets    
Gross Amounts Not Offset in the Statements of Condition 15 19
Cash Collateral Pledged (Received) (10) 0
Liabilities    
Gross Amounts Not Offset in the Statements of Condition 22 22
Cash Collateral Pledged (Received) 28 35
Derivatives not designated as hedging instruments: | Interest rate swaps    
Assets    
Gross Amounts Not Offset in the Statements of Condition 15 19
Cash Collateral Pledged (Received) (10) 0
Liabilities    
Gross Amounts Not Offset in the Statements of Condition 22 21
Cash Collateral Pledged (Received) 27 34
Derivatives not designated as hedging instruments: | Mortgage-backed securities forwards    
Liabilities    
Gross Amounts Not Offset in the Statements of Condition 0 1
Cash Collateral Pledged (Received) $ 1 $ 1