Fair Value Disclosures - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investments excluded from Fair Value Hierarchy, net asset value practical expedient	$ 361	$ 440
Loans Held-for-sale	3,149	3,544
Carrying value of unfunded commitments	247	260
Nonperforming
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Loans Held-for-sale		22
Carrying Amount
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Loans Held-for-sale	375	1,200
Level 3
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Loans Held-for-sale	$ 0	$ 0