Condensed Financial Statements Of Parent Company Condensed Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Investments
Fair value of fixed maturities	$ 13,791	$ 12,132
Fair value of equity securities	10,989	9,841
Other invested assets	577	452
Total investments	25,357	22,425
Investment income receivable	192	160
Land, building and equipment, net, for company use (accumulated depreciation: 2023—$164; 2022—$156)	208	202
Other assets	681	646
Total assets	32,769	29,732
Liabilities
Deferred federal income tax	1,705	1,376
Long-term debt	790	789
Other liabilities	1,311	1,229
Total liabilities	20,671	19,170
Shareholders' Equity
Common stock	397	397
Paid-in capital	1,437	1,392
Retained earnings	13,084	11,711
Accumulated other comprehensive income	(435)	(614)
Treasury stock at cost	(2,385)	(2,324)
Total shareholders' equity	12,098	10,562	$ 12,764
Total liabilities and shareholders' equity	32,769	29,732
Cincinnati Financial Corporation
Investments
Fair value of fixed maturities	176	78
Fair value of equity securities	4,544	3,978
Other invested assets	49	53
Total investments	4,769	4,109
Cash and cash equivalents	138	121	$ 211	$ 16
Equity in net assets of subsidiaries	8,481	7,427
Investment income receivable	13	11
Land, building and equipment, net, for company use (accumulated depreciation: 2023—$164; 2022—$156)	138	136
Income tax receivable	4	5
Other assets	150	116
Due from subsidiaries	40	102
Total assets	13,733	12,027
Liabilities
Dividends declared but unpaid	118	108
Deferred federal income tax	624	480
Long-term debt	789	789
Other liabilities	104	88
Total liabilities	1,635	1,465
Shareholders' Equity
Common stock	397	397
Paid-in capital	1,437	1,392
Retained earnings	13,084	11,711
Accumulated other comprehensive income	(435)	(614)
Treasury stock at cost	(2,385)	(2,324)
Total shareholders' equity	12,098	10,562
Total liabilities and shareholders' equity	$ 13,733	$ 12,027