Leases - Operating ROU Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease ROU assets	$ 495	$ 139
Operating lease liabilities	$ 488	$ 217
Weighted-average remaining lease term	17 years 2 months 12 days	8 years 1 month 6 days
Weighted-average discount rate (percent)	5.10%	3.00%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets, net of allowance for credit losses of nil at both December 31, 2023 and 2022 (includes $10 million and $325 million designated under fair value option at December 31, 2023 and 2022, respectively)	Other assets, net of allowance for credit losses of nil at both December 31, 2023 and 2022 (includes $10 million and $325 million designated under fair value option at December 31, 2023 and 2022, respectively)
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Interest, taxes and other liabilities (includes $10 million and $325 million designated under fair value option at December 31, 2023 and 2022, respectively)	Interest, taxes and other liabilities (includes $10 million and $325 million designated under fair value option at December 31, 2023 and 2022, respectively)