CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Revenues
Net premiums	$ 3,385.0	$ 3,155.0
Net investment income	856.0	810.0
Investment related gains (losses), net	(77.0)	(139.0)
Other revenues	87.0	91.0
Total revenues	4,251.0	3,917.0
Benefits and expenses
Claims and other policy benefits	3,063.0	2,871.0
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	(26.0)	58.0
Market Risk Benefit, Change in Fair Value, Gain (Loss)	14.0	(34.0)
Interest credited	215.0	141.0
Policy acquisition costs and other insurance expenses	331.0	344.0
Other operating expenses	250.0	227.0
Interest expense	50.0	42.0
Collateral finance and securitization expense	3.0	1.0
Total benefits and expenses	3,900.0	3,650.0
Income before income taxes	351.0	267.0
Provision for income taxes	98.0	70.0
Net income	$ 252.0	$ 197.0	$ 517.0	$ 1,170.0
Earnings per share
Basic earnings per share	$ 3.77	$ 2.93
Diluted earnings per share	$ 3.72	$ 2.91
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 253.0	$ 197.0	521.0
Net Income (Loss) Attributable to Noncontrolling Interest	$ 1.0	$ 0.0	$ 4.0