Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets
Amortized Cost	$ 306,025	$ 310,884
Amortized cost of fixed maturity securities valuation allowances	183	91
Mortgage loans valuation allowances	527	634
Residential mortgage loans — FVO	83,763	79,353
Real estate and real estate joint ventures (includes $299 and $240, respectively, under the fair value option and $0 and $175, respectively, of real estate held-for-sale)	13,137	12,216
Real Estate Held-for-sale	0	175
Other Invested Assets - Leveraged and Direct Financing Leases	1,926	1,930
Other invested assets, at estimated fair value	20,038	18,655
Net Investment in Lease, Allowance for Credit Loss	$ 26	$ 40
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	1,189,831,471	1,186,540,473
Common stock, shares outstanding	779,098,414	825,540,267
Treasury stock, shares	410,733,057	361,000,206
Residential mortgage loans - FVO
Assets
Residential mortgage loans — FVO	$ 0	$ 127
Real estate and real estate joint venture [Member]
Assets
Real estate and real estate joint ventures (includes $299 and $240, respectively, under the fair value option and $0 and $175, respectively, of real estate held-for-sale)	299	240
Variable interest entities
Assets
Other invested assets, at estimated fair value	$ 326	$ 351