Insurance - Reconciliation of Net Liability for Future Policy Benefits To the Consolidated Statements of Financial Position (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Liability for Future Policy Benefit, Activity [Line Items]
Insurance claims and policyholder liabilities	$ 615	$ 620	$ 693	$ 718
Term and Whole Life
Liability for Future Policy Benefit, Activity [Line Items]
Total net liability for future policy benefits	232	247
Accidental Death and Disability Protection
Liability for Future Policy Benefit, Activity [Line Items]
Total net liability for future policy benefits	123	135
Other
Liability for Future Policy Benefit, Activity [Line Items]
Other	$ 260	$ 238