Condensed Financial Statements Of Parent Company Condensed Statements Of Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues
Investment income, net of expenses	$ 781	$ 714	$ 670
Investment gains and losses, net	(1,467)	2,409	865
Other revenues	10	10	10
Total revenues	6,557	9,630	7,536
Expenses
Interest expense	53	53	54
Other expenses	23	20	20
Total expenses	7,250	5,960	6,037
Provision (Benefit) for Income Taxes	(207)	724	283
Net Income (Loss)	(486)	2,946	1,216
Amortization of pension actuarial gains and losses and prior service costs	7	54	(25)
Other comprehensive income (loss)	(1,284)	(121)	321
Comprehensive Income (Loss)	(1,770)	2,825	1,537
Cincinnati Financial Corporation
Revenues
Investment income, net of expenses	101	91	81
Investment gains and losses, net	(790)	1,058	556
Other revenues	15	15	15
Total revenues	(674)	1,164	652
Expenses
Interest expense	53	53	54
Other expenses	33	32	34
Total expenses	86	85	88
Income (Loss) Before Income Taxes and Earnings of Subsidiaries	(760)	1,079	564
Provision (Benefit) for Income Taxes	(161)	217	111
Net Income (Loss) Before Earnings of Subsidiaries	(599)	862	453
Increase in equity of subsidiaries	113	2,084	763
Net Income (Loss)	(486)	2,946	1,216
Change in unrealized gain (loss) on securities	(10)	1	0
Amortization of pension actuarial gains and losses and prior service costs	7	54	(25)
Other Comprehensive Income (Loss) Before Other Comprehensive Income (Loss) from Subsidiaries	(3)	55	(25)
Other Comprehensive Income (Loss) of subsidiaries	(1,281)	(176)	346
Other comprehensive income (loss)	(1,284)	(121)	321
Comprehensive Income (Loss)	$ (1,770)	$ 2,825	$ 1,537