Insurance and Contractholder Liabilities - Unpaid Claims and Claim Expenses - Other Operations - Liability Balance Details (Details) - Other Operations - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid claims and claim expenses	$ 728
Unpaid claims and claim expenses		$ 761
International businesses to be sold
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid claims and claim expenses	447
Unpaid claims and claim expenses		452
Other Operations
Liability for Claims and Claims Adjustment Expense [Line Items]
Unpaid claims and claim expenses	$ 281
Unpaid claims and claim expenses		$ 309