Segment Information (Total Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Separate account assets	$ 146,038	$ 179,873
Separate account liabilities	146,038	179,873
Total assets	666,611	759,708
U.S.
Segment Reporting Information [Line Items]
Separate account assets	61,030	81,217
Separate account liabilities	61,030	81,217
Total assets	$ 252,559	$ 282,741
Net investment income from equity method investments	5.00%	23.00%	5.00%
Asia
Segment Reporting Information [Line Items]
Separate account assets	$ 8,292	$ 10,241
Separate account liabilities	8,292	10,241
Total assets	$ 150,134	$ 169,291
Net investment income from equity method investments	12.00%	30.00%	12.00%
Latin America
Segment Reporting Information [Line Items]
Separate account assets	$ 39,428	$ 37,632
Separate account liabilities	39,428	37,632
Total assets	$ 63,810	$ 59,763
Net investment income from equity method investments	3.00%	7.00%	1.00%
EMEA
Segment Reporting Information [Line Items]
Separate account assets	$ 3,314	$ 3,098
Separate account liabilities	3,314	3,098
Total assets	16,765	27,038
MetLife Holdings
Segment Reporting Information [Line Items]
Separate account assets	33,974	47,685
Separate account liabilities	33,974	47,685
Total assets	$ 149,739	$ 179,551
Net investment income from equity method investments	6.00%	26.00%	5.00%
Corporate & Other
Segment Reporting Information [Line Items]
Separate account assets	$ 0	$ 0
Separate account liabilities	0	0
Total assets	$ 33,604	$ 41,324