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Derivative and Hedging Activities - Information Regarding Derivative Financial Instruments (Details) $ in Millions | Dec. 31, 2022 USD ($)
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Derivative [Line Items] |  |
Amount of designated hedged items | $ 2,300 |
Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Amount of designated hedged items | 0 |
Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Amount of designated hedged items | 3,711 |
Derivative Assets, Notional Amount | 11,403 |
Derivative Assets, Fair Value | 220 |
Derivative Liabilities, Fair Value | 126 |
Other Assets | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Assets, Fair Value | 229 |
Other Liabilities | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Liabilities, Fair Value | 136 |
Fair Value Hedging | Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Amount of designated hedged items | 3,750 |
Fair Value Hedging | Other Assets | Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative, Fair Value | 5 |
Interest Rate Swap | Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Amount of designated hedged items | 2,000 |
Interest Rate Swap | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Liabilities, Fair Value | 65 | [1]
Interest Rate Swap | Fair Value Hedging | Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Amount of designated hedged items | 3,750 |
Interest Rate Swap | Fair Value Hedging | Other Assets | Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Derivative, Fair Value | 5 |
Futures | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Assets, Notional Amount | 1,205 |
Derivative Assets, Fair Value | 2 |
Futures | Other Assets | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Assets, Fair Value | 2 |
Mortgage-backed Securities Forwards | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Assets, Notional Amount | 1,065 |
Derivative Liabilites, Notional Amount | 739 |
Derivative Assets, Fair Value | 36 |
Derivative Liabilities, Fair Value | 61 |
Mortgage-backed Securities Forwards | Other Assets | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Assets, Fair Value | 36 |
Mortgage-backed Securities Forwards | Other Liabilities | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Liabilities, Fair Value | 61 |
Rate Lock Commitments | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Assets, Notional Amount | 1,539 |
Derivative Liabilites, Notional Amount | 527 |
Rate Lock Commitments | Other Assets | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Assets, Fair Value | 9 |
Rate Lock Commitments | Other Liabilities | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Liabilities, Fair Value | 10 |
Interest Rate Swaps and Swaptions | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Assets, Notional Amount | 7,594 |
Derivative Liabilites, Notional Amount | 2,445 |
Interest Rate Swaps and Swaptions | Other Assets | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Assets, Fair Value | 182 |
Interest Rate Swaps and Swaptions | Other Liabilities | Not Designated as Hedging Instrument [Member] |  |
Derivative [Line Items] |  |
Derivative Liabilities, Fair Value | $ 65 |
[1] | Variation margin pledged to, or received from, a Central Counterparty Clearing House to cover the prior days fair value of open positions is considered settlement of the derivative position for accounting purposes.

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