Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues
Premiums	$ 9,873	$ 9,158	$ 19,092	$ 18,309
Universal life and investment-type product policy fees	2,458	2,371	4,879	4,662
Net investment income	5,259	5,282	10,294	11,359
Other revenues	490	490	968	970
Net investment gains (losses):
Other-than-temporary impairments on fixed maturity securities	(9)	(35)	(23)	(64)
Other-than-temporary impairments on fixed maturity securities transferred to other comprehensive income (loss)	(6)	(4)	(2)	(35)
Other net investment gains (losses)	(110)	149	(511)	523
Total net investment gains (losses)	(125)	110	(536)	424
Net derivative gains (losses)	311	(1,690)	654	(2,320)
Total revenues	18,266	15,721	35,351	33,404
Expenses
Policyholder benefits and claims	9,988	8,960	19,312	18,355
Interest credited to policyholder account balances	1,709	1,846	3,178	4,436
Policyholder dividends	397	329	700	642
Other expenses	4,222	4,025	8,385	8,163
Total expenses	16,316	15,160	31,575	31,596
Income (loss) from continuing operations before provision for income tax	1,950	561	3,776	1,808
Provision for income tax expense (benefit)	574	53	1,058	305
Income (loss) from continuing operations, net of income tax	1,376	508	2,718	1,503
Income (loss) from discontinued operations, net of income tax	0	2	(3)	(1)
Net income (loss)	1,376	510	2,715	1,502
Less: Net income (loss) attributable to noncontrolling interests	10	8	21	14
Net income (loss) attributable to MetLife, Inc.	1,366	502	2,694	1,488
Less: Preferred stock dividends	31	31	61	61
Net income (loss) available to MetLife, Inc.'s common shareholders	1,335	471	2,633	1,427
Comprehensive income (loss)	4,228	(3,881)	8,710	(3,703)
Less: Comprehensive income (loss) attributable to noncontrolling interests, net of income tax	19	(5)	62	4
Comprehensive income (loss) attributable to MetLife, Inc.	$ 4,209	$ (3,876)	$ 8,648	$ (3,707)
Income (loss) from continuing operations, net of income tax, available to MetLife, Inc.'s common shareholders per common share:
Basic	$ 1.18	$ 0.43	$ 2.34	$ 1.30
Diluted	$ 1.17	$ 0.43	$ 2.31	$ 1.29
Net income (loss) available to MetLife, Inc.'s common shareholders per common share:
Basic	$ 1.18	$ 0.43	$ 2.34	$ 1.30
Diluted	$ 1.17	$ 0.43	$ 2.31	$ 1.29
Cash dividends declared per common share	$ 0.350	$ 0.550	$ 0.625	$ 0.735