Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Assets
Amortized cost of fixed maturity securities valuation allowances	$ 113	$ 184
Amortized Cost	300,623	300,555
Mortgage loans valuation allowances	814	721
Real estate and real estate joint ventures - FVO	12,992	13,332
Other Invested Assets - Leveraged and Direct Financing Leases	1,843	1,993
Other invested assets, at estimated fair value (2)	18,097	18,202
Liabilities
Long-term debt (includes $26 and $0, respectively, relating to variable interest entities)	$ 15,972	$ 15,548
MetLife, Inc.’s stockholders’ equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, Liquidation Preference, Value	$ 3,905	$ 3,905
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	3,000,000,000	3,000,000,000
Common stock, shares issued	1,193,562,132	1,191,823,651
Common stock, shares outstanding	715,661,353	730,821,111
Treasury stock, shares	477,900,779	461,002,540
Residential mortgage loans - FVO
Assets
Real estate and real estate joint ventures - FVO	$ 328	$ 317
Variable interest entities
Assets
Other invested assets, at estimated fair value (2)	432	333
Liabilities
Long-term debt (includes $26 and $0, respectively, relating to variable interest entities)	$ 26	$ 0