Schedule V Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Allowance for mortgage and other loans receivable
Valuation and Qualifying Accounts
Balance at the beginning of the year	$ 438	$ 397	$ 322
Initial Allowance Upon CECL Adoption	318	0	0
Charged to costs and expenses	75	46	93
Charge offs	(17)	(5)	(19)
Acquisitions	0	0	0
Other changes	0	0	1
Balance at the end of the year	814	438	397
Allowance for premiums and insurances balances receivable
Valuation and Qualifying Accounts
Balance at the beginning of the year	178	216	236
Initial Allowance Upon CECL Adoption	34	0	0
Charged to costs and expenses	6	(25)	2
Charge offs	(12)	(23)	(20)
Acquisitions	0	0	0
Other changes	(1)	10	(2)
Balance at the end of the year	205	178	216
Allowance for reinsurance assets
Valuation and Qualifying Accounts
Balance at the beginning of the year	151	140	187
Initial Allowance Upon CECL Adoption	172	0	0
Charged to costs and expenses	12	20	(8)
Charge offs	(9)	(11)	(45)
Acquisitions	0	0	8
Other changes	0	2	(2)
Balance at the end of the year	326	151	140
Federal and foreign valuation allowance for deferred tax assets
Valuation and Qualifying Accounts
Balance at the beginning of the year	1,425	1,779	1,374
Initial Allowance Upon CECL Adoption	0	0	0
Charged to costs and expenses	(65)	(44)	21
Charge offs	0	0	0
Acquisitions	0	0	82
Other changes	(30)	(310)	302
Balance at the end of the year	$ 1,330	$ 1,425	$ 1,779