Restructuring and Other Costs, Before Tax (Details) - Other Operating Income (Expense) [Member] - Hartford Next Program - USD ($) $ in Millions	3 Months Ended		6 Months Ended		24 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 2	$ 0	$ 7	$ 11	$ 112
Restructuring and Related Cost, Expected Cost	127		127		127
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	(5)	(9)	(7)	(9)	41
Restructuring and Related Cost, Expected Cost	41		41		41
Information Technology
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	3	2	5	4	16
Restructuring and Related Cost, Expected Cost	26		26		26
Professional fees and other expenses
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	4	$ 7	9	$ 16	55
Restructuring and Related Cost, Expected Cost	$ 60		$ 60		$ 60