Condensed Consolidated Statements of Financial Position (unaudited) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Statement of Financial Position [Abstract]
Impairment of purchased intangibles	$ 0	$ 0
Investments
Fixed income securities, at fair value (amortized cost, net $62,267 and $56,293)	66,551	66,551	$ 59,044
Equity securities, at fair value (cost $3,867 and $6,568)	4,395	4,395	8,162
Mortgage loans, net	4,655	4,655	4,817
Limited partnership interests	7,232	7,232	8,078
Short-term investments	4,559	4,559	4,256
Other, net	3,805	3,805	4,005
Total investments	91,197	91,197	88,362
Cash	370	370	338
Premium installment receivables, net	6,609	6,609	6,472
Deferred policy acquisition costs	4,661	4,661	4,699
Reinsurance and indemnification recoverables, net	9,097	9,097	9,211
Accrued investment income	616	616	600
Property and equipment, net	1,076	1,076	1,145
Goodwill	2,544	2,544	2,545
Other assets, net	3,516	3,516	3,534
Separate Accounts	3,064	3,064	3,044
Total assets	122,750	122,750	119,950
Liabilities
Reserve for property and casualty insurance claims and claims expense	27,987	27,987	27,712
Reserve for life-contingent contract benefits	12,759	12,759	12,300
Contractholder funds	17,288	17,288	17,692
Unearned premiums	16,029	16,029	15,343
Claim payments outstanding	1,013	1,013	929
Deferred income taxes	905	905	1,154
Other liabilities and accrued expenses	9,807	9,807	9,147
Long-term debt	6,635	6,635	6,631
Separate Accounts	3,064	3,064	3,044
Total liabilities	95,487	95,487	93,952
Commitments and Contingent Liabilities (Note 12)
Shareholders’ equity
Preferred stock and additional capital paid-in, $1 par value, 25 million shares authorized, 81.0 thousand and 92.5 thousand shares issued and outstanding, $2,025 and $2,313 aggregate liquidation preference	1,970	1,970	2,248
Common stock, $.01 par value, 3.0 billion shares authorized and 900 million issued, 304 million and 319 million shares outstanding	9	9	9
Additional capital paid-in	3,453	3,453	3,463
Retained income	50,336	50,336	48,074
Treasury stock, at cost (596 million and 581 million shares)	(31,338)	(31,338)	(29,746)
Unrealized net capital gains and losses:
Unrealized net capital gains and losses on fixed income securities with credit losses	(1)	(1)	70
Other unrealized net capital gains and losses	3,373	3,373	2,094
Unrealized adjustment to DAC, DSI and insurance reserves	(628)	(628)	(277)
Total unrealized net capital gains and losses	2,744	2,744	1,887
Unrealized foreign currency translation adjustments	(64)	(64)	(59)
Unamortized pension and other postretirement prior service credit	153	153	122
Total accumulated other comprehensive income (“AOCI”)	2,833	2,833	1,950
Total shareholders’ equity	27,263	27,263	25,998
Total liabilities and shareholders’ equity	$ 122,750	$ 122,750	$ 119,950