Schedule II Condensed Financial Information of Registrant - Parent Company Only (Details - Statements of Cash Flows) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2018
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	$ 1,038	$ (1,807)	$ (394)
Cash flows from investing activities:
Sale of divested businesses	2,173	2	10
Net change in short-term investments	(4,925)	(3,633)	1,524
Acquisition of businesses	0	0	(5,717)
Mortgage and other loans receivable	(5,990)	(9,515)	(10,286)
Other, net	6	1,503	200
Net cash used in investing activities	(6,202)	(5,475)	(223)
Cash flows from financing activities:
Issuance of preferred stock	0	485	0
Dividends paid on preferred stock	(29)	(22)	0
Dividends paid on common stock	(1,103)	(1,114)	(1,138)
Purchase of common stock	(500)	0	(1,739)
Other, net	(541)	(1,600)	3,570
Net cash provided by financing activities	5,058	7,258	1,249
Net increase (decrease) in cash and restricted cash	(57)	(8)	621
Cash and restricted cash at beginning of year	3,287	3,358	2,737
Cash and restricted cash at end of year	3,230	3,287	3,358
Cash Equivalents, Restricted Cash and Restricted Cash Equivalents:
Cash				$ 2,827	[1]	$ 2,856	[1]	$ 2,873
Total cash and restricted cash shown in the Consolidated Statements of Cash Flows	3,287	3,287	3,358	3,230		3,287		3,358
Interest:
Third party	(1,147)	(1,326)	(1,312)
Taxes:
Income tax authorities	(975)	(252)	(154)
Other Assets [Member]
Cash Equivalents, Restricted Cash and Restricted Cash Equivalents:
Restricted cash				223		243		343
Short-term Investments [Member]
Cash Equivalents, Restricted Cash and Restricted Cash Equivalents:
Restricted cash				180		188		142
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities	(30)	3,484	1,256
Cash flows from investing activities:
Sales and maturities of investments	5,181	2,313	5,587
Sale of divested businesses	2,225	0	0
Purchase of investments	(3,250)	(2,957)	(1,980)
Net change in short-term investments	(3,559)	(2,170)	1,533
Contributions from (to) subsidiaries - net	(964)	(237)	1
Acquisition of businesses	0	0	(5,475)
Loans to subsidiaries - net	(22)	513	868
Other, net	(402)	67	(73)
Net cash used in investing activities	(791)	(2,471)	461
Cash flows from financing activities:
Issuance of long-term debt	4,065	595	2,470
Repayments of long-term debt	(1,696)	(1,006)	(1,493)
Issuance of preferred stock	0	485	0
Dividends paid on preferred stock	(29)	(22)	0
Dividends paid on common stock	(1,103)	(1,114)	(1,138)
Loans from subsidiaries - net	16	93	90
Purchase of common stock	(500)	0	(1,739)
Other, net	(33)	(66)	212
Net cash provided by financing activities	720	(1,035)	(1,598)
Net increase (decrease) in cash and restricted cash	(101)	(22)	119
Cash and restricted cash at beginning of year	105	127	8
Cash and restricted cash at end of year	4	105	127
Cash Equivalents, Restricted Cash and Restricted Cash Equivalents:
Cash				3		2		2
Total cash and restricted cash shown in the Consolidated Statements of Cash Flows	4	127	8	4		105		127
Interest:
Third party	(1,014)	(941)	(914)
Intercompany	0	(3)	1
Taxes:
Income tax authorities	(466)	(11)	(32)
Intercompany	1,592	1,179	895
Non-cash investing/financing activities:
Capital contributions	333	15	2,369
Return of capital	0	15	2,706
Dividends received in the form of securities	$ 879	$ 702	$ 745
Parent Company [Member] | Other Assets [Member]
Cash Equivalents, Restricted Cash and Restricted Cash Equivalents:
Restricted cash				1		1		1
Parent Company [Member] | Short-term Investments [Member]
Cash Equivalents, Restricted Cash and Restricted Cash Equivalents:
Restricted cash				$ 0		$ 102		$ 124

[1] See Note 10 for details of balances associated with variable interest entities.