Condensed Financial Statements Of Parent Company Condensed Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investments
Fair value of fixed maturities	$ 13,022	$ 12,338
Equity securities, at fair value (cost: 2021—$1,660; 2020—$1,607)	11,315	8,856
Other invested assets	329	348
Total investments	24,666	21,542
Cash and cash equivalents	1,139	900	$ 767	$ 784
Investment income receivable	144	136
Land, building and equipment, net, for company use (accumulated depreciation: 2021—$147; 2020—$138)	205	213
Other assets	570	438
Total assets	31,387	27,542
Liabilities
Deferred federal income tax	2,029	1,555
Long-term debt	789	788
Other liabilities	1,092	982
Total liabilities	18,282	16,753
Shareholders' Equity
Common stock	397	397
Paid-in capital	1,356	1,328
Retained earnings	12,625	10,085
Accumulated other comprehensive income	648	769
Treasury stock at cost	(1,921)	(1,790)
Total shareholders' equity	13,105	10,789	9,864
Total liabilities and shareholders' equity	31,387	27,542
Cincinnati Financial Corporation
Investments
Fair value of fixed maturities	64	68
Equity securities, at fair value (cost: 2021—$1,660; 2020—$1,607)	4,778	3,687
Other invested assets	46	145
Total investments	4,888	3,900
Cash and cash equivalents	211	16	$ 197	$ 209
Equity in net assets of subsidiaries	9,292	7,982
Investment income receivable	9	8
Land, building and equipment, net, for company use (accumulated depreciation: 2021—$147; 2020—$138)	140	143
Income tax receivable	0	5
Other assets	108	53
Due from subsidiaries	106	110
Total assets	14,754	12,217
Liabilities
Dividends declared but unpaid	101	97
Deferred federal income tax	664	429
Long-term debt	789	788
Other liabilities	95	114
Total liabilities	1,649	1,428
Shareholders' Equity
Common stock	397	397
Paid-in capital	1,356	1,328
Retained earnings	12,625	10,085
Accumulated other comprehensive income	648	769
Treasury stock at cost	(1,921)	(1,790)
Total shareholders' equity	13,105	10,789
Total liabilities and shareholders' equity	$ 14,754	$ 12,217