CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues
Net premiums	$ 12,513.0	$ 11,694.0	$ 11,297.0
Investment income, net of related expenses	3,138.0	2,575.0	2,520.0
Investment related gains (losses), net:
Investment related gains (losses), net	560.0	(33.0)	91.0
Other revenues	447.0	360.0	392.0
Total revenues	16,658.0	14,596.0	14,300.0
Benefits and expenses
Claims and other policy benefits	12,776.0	11,075.0	10,197.0
Interest credited	700.0	704.0	697.0
Policy acquisition costs and other insurance expenses	1,416.0	1,261.0	1,204.0
Other operating expenses	936.0	816.0	868.0
Interest expense	127.0	170.0	173.0
Collateral finance and securitization expense	12.0	17.0	29.0
Total benefits and expenses	15,967.0	14,043.0	13,168.0
Income before income taxes	691.0	553.0	1,132.0
Provision for income taxes	74.0	138.0	262.0
Net income	$ 617.0	$ 415.0	$ 870.0
Earnings per share
Basic earnings per share (in dollars per share)	$ 9.10	$ 6.35	$ 13.88
Diluted earnings per share (in dollars per share)	$ 9.04	$ 6.31	$ 13.62