Policy Claims and Benefits (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Liability for Claims and Claims Adjustment Expense	$ 8,053	$ 7,556
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	(556)	(641)
Liability For Unpaid Claims And Claims Adjustment Expense Net Of Recoverable	7,497	6,915
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Current Year Claims and Claims Adjustment Expense	10,532	9,948
Prior Year Claims and Claims Adjustment Expense	(155)	(159)
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims	10,377	9,789
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year	(4,545)	(3,712)
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years	(5,971)	(5,229)
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid	(10,516)	(8,941)
Liability for Unpaid Claims and Claims Adjustment Expense, Interest Accretion	23	30
Liability for Unpaid Claims and Claims Adjustment Expense, Foreign Currency Translation Gain (Loss)	(499)	(135)
Liability for Unpaid Claims and Claims Adjustment Expense, Adjustments	(476)	(105)
Liability For Unpaid Claims And Claims Adjustment Expense Net Of Recoverable	6,882	7,658
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	(456)	(538)
Liability for Claims and Claims Adjustment Expense	$ 7,338	$ 8,196

Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims.

No definition available.