Derivatives - Offsetting Assets (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Offsetting
Derivative asset, subject to master netting arrangement, before offset	$ 160	$ 217
Derivative asset, subject to master netting arrangement, liability offset	19	40
Derivative asset, subject to master netting arrangement, collateral, obligation to return cash not offset	0	0
Derivative asset, fair value, offset against collateral, net of not subject to master netting arrangement, policy election	141	177
Derivative asset, not subject to master netting arrangement	0	0
Derivative asset, not subject to master netting arrangement, deduction	0	0
Gross amount of derivative assets presented in the consolidated balance sheet, including not subject to master netting arrangement	160	217
Net amount of derivative assets, including not subject to master netting arrangement	$ 141	$ 177