Fair Value Disclosures - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 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	$ 385	$ 440
Loans Held-for-sale	1,065	3,544
Carrying value of unfunded commitments	272	260
Carrying Amount
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Loans Held-for-sale	$ 108	$ 1,200