Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Assets
Amortized cost of fixed maturity securities available-for-sale	$ 307,102	$ 310,811
Debt Securities, Available-for-sale, Allowance for Credit Loss	99	81
Mortgage loans valuation allowances	570	590
Residential mortgage loans — FVO	81,497	83,919
Real estate and real estate joint ventures (includes $191 and $169, respectively, under the fair value option and $78 and $128, respectively, of real estate held-for-sale)	11,901	11,933
Real Estate Held-for-sale	78	128
Other Invested Assets - Leveraged and Direct Financing Leases	2,132	2,156
Other invested assets relating to variable interest entities	18,977	20,593
Cash and cash equivalents relating to variable interest entities	25,037	19,795
Premiums, reinsurance and other receivables relating to variable interest entities	18,236	17,870
Other assets relating to variable interest entities	11,651	11,685
Liabilities
Long-term debt, at estimated fair value, relating to variable interest entities	14,518	14,603
Other liabilities relating to variable interest entities	$ 23,250	$ 23,614
MetLife, Inc.’s stockholders’ equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, aggregate liquidation preference	$ 3,905	$ 4,405
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	3,000,000,000	3,000,000,000
Common stock, shares issued	1,185,931,582	1,181,614,288
Common stock, shares outstanding	861,057,466	892,910,600
Treasury stock, shares	324,874,116	288,703,688
Residential mortgage loans - FVO
Assets
Residential mortgage loans — FVO	$ 140	$ 165
Real estate and real estate joint venture [Member]
Assets
Real estate and real estate joint ventures (includes $191 and $169, respectively, under the fair value option and $78 and $128, respectively, of real estate held-for-sale)	191	169
Variable interest entities
Assets
Other invested assets relating to variable interest entities	391	332
Cash and cash equivalents relating to variable interest entities	5	12
Premiums, reinsurance and other receivables relating to variable interest entities	5	4
Other assets relating to variable interest entities	2	1
Liabilities
Long-term debt, at estimated fair value, relating to variable interest entities	0	5
Other liabilities relating to variable interest entities	$ 10	$ 1