Derivative Instruments and Hedging Activities - Offsetting Assets (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivative assets
Gross Amounts	$ 2,649	$ 2,675
Financial Instruments	(268)	(433)
Cash Collateral Received	(782)	(572)
Net Amounts as Recognized	1,599	1,670
Securities Collateral Held Under Master Netting Agreements	(19)	(22)
Net Exposure	$ 1,580	$ 1,648