Business, Basis of Presentation and Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business, Basis of Presentation and Summary of Significant Accounting Policies	1. Business, Basis of Presentation and Summary of Significant Accounting Policies Business “MetLife” or the “Company” refers to MetLife, Inc., a Delaware corporation incorporated in 1999, its subsidiaries and affiliates. MetLife is a leading global provider of insurance, annuities and employee benefit programs throughout the United States, Japan, Latin America, Asia, Europe and the Middle East. MetLife offers life insurance, annuities, property & casualty insurance, and other financial services to individuals, as well as group insurance and retirement & savings products and services to corporations and other institutions. MetLife is organized into six segments: Retail; Group, Voluntary & Worksite Benefits; Corporate Benefit Funding; and Latin America (collectively, the “Americas”); Asia; and Europe, the Middle East and Africa (“EMEA”). Basis of Presentation The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to adopt accounting policies and make estimates and assumptions that affect amounts reported in the interim condensed consolidated financial statements. In applying these policies and estimates, management makes subjective and complex judgments that frequently require assumptions about matters that are inherently uncertain. Many of these policies, estimates and related judgments are common in the insurance and financial services industries; others are specific to the Company’s business and operations. Actual results could differ from estimates. The accompanying interim condensed consolidated financial statements include the accounts of MetLife, Inc. and its subsidiaries, as well as partnerships and joint ventures in which the Company has control, and variable interest entities (“VIEs”) for which the Company is the primary beneficiary. Intercompany accounts and transactions have been eliminated. Certain international subsidiaries have a fiscal year-end of November 30. Accordingly, the Company’s interim condensed consolidated financial statements reflect the assets and liabilities of such subsidiaries as of February 28, 2014 and November 30, 2013 and the operating results of such subsidiaries for the three months ended February 28, 2014 and 2013. The Company uses the equity method of accounting for investments in equity securities when it has significant influence or at least 20% interest and for investments in real estate joint ventures and other limited partnership interests (“investees”) when it has more than a minor ownership interest or more than a minor influence over the investee’s operations, but does not have a controlling financial interest. The Company generally recognizes its share of the investee’s earnings on a three-month lag in instances where the investee’s financial information is not sufficiently timely or when the investee’s reporting period differs from the Company’s reporting period. The Company uses the cost method of accounting for investments in which it has virtually no influence over the investee’s operations. Certain amounts in the prior year periods’ interim condensed consolidated financial statements and related footnotes thereto have been reclassified to conform with the 2014 presentation as discussed throughout the Notes to the Interim Condensed Consolidated Financial Statements. The accompanying interim condensed consolidated financial statements are unaudited and reflect all adjustments (including normal recurring adjustments) necessary to present fairly the financial position, results of operations and cash flows for the interim periods presented in conformity with GAAP. Interim results are not necessarily indicative of full year performance. The December 31, 2013 consolidated balance sheet data was derived from audited consolidated financial statements included in MetLife, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2013 (the “2013 Annual Report”), filed with the U.S. Securities and Exchange Commission (“SEC”), which include all disclosures required by GAAP. Therefore, these interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements of the Company included in the 2013 Annual Report. Adoption of New Accounting Pronouncements Effective January 1, 2014, the Company adopted new guidance regarding reporting of discontinued operations and disclosures of disposals of components of an entity. The guidance increases the threshold for a disposal to qualify as a discontinued operation, expands the disclosures for discontinued operations and requires new disclosures for certain disposals that do not meet the definition of a discontinued operation. Disposals must now represent a strategic shift that has or will have a major effect on the entity’s operations and financial results to qualify as discontinued operations. As discussed in Note 3, the Company has entered into a definitive agreement to sell its wholly-owned subsidiary, MetLife Assurance Limited (“MAL”). As a result of the adoption of this new guidance, the results of operations of MAL and the estimated loss on sale have been included in income from continuing operations. Effective January 1, 2014, the Company adopted new guidance regarding the presentation of an unrecognized tax benefit. The new guidance requires that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. However, when the carryforwards are not available at the reporting date to settle any additional income taxes that would result from the disallowance of a tax position or the applicable tax law does not require, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit will be presented in the financial statements as a liability and will not be combined with the related deferred tax asset. The adoption was prospectively applied and resulted in a reduction to other liabilities and a corresponding increase to deferred income tax liability in the amount of $277 million. Effective January 1, 2014, the Company adopted new guidance regarding foreign currency that requires an entity that ceases to have a controlling financial interest in a subsidiary or group of assets within a foreign entity to release any related cumulative translation adjustment into net income. Accordingly, the cumulative translation adjustment should be released into net income only if the sale or transfer results in the complete or substantially complete liquidation of the foreign entity in which the subsidiary or group of assets had resided. For an equity method investment that is a foreign entity, a pro rata portion of the cumulative translation adjustment should be released into net income upon a partial sale of such an equity method investment. The new guidance did not have a material impact on the financial statements upon adoption. Effective January 1, 2014, the Company adopted new guidance regarding liabilities that requires an entity to measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of the guidance is fixed at the reporting date, as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors and any additional amount the reporting entity expects to pay on behalf of its co-obligors. In addition, the amendments require an entity to disclose the nature and amount of the obligation, as well as other information about the obligation. The new guidance did not have a material impact on the financial statements upon adoption. Effective January 1, 2014, the Company adopted new guidance on other expenses which address how health insurers should recognize and classify in their income statements fees mandated by the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act. The amendments in this standard specify that the liability for the fee should be estimated and recorded in full once the entity provides qualifying health insurance in the applicable calendar year in which the fee is payable with a corresponding deferred cost that is amortized to expense using the straight-line method of allocation unless another method better allocates the fee over the calendar year that it is payable. In accordance with the adoption of the new accounting pronouncement on January 1, 2014, the Company recorded $57 million in other liabilities, and a corresponding deferred cost, in other assets. Future Adoption of New Accounting Pronouncements In January 2014, the Financial Accounting Standards Board issued new guidance regarding investments (Accounting Standards Update 2014-01, Investments — Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects). This guidance is applicable to investments in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for the low-income housing tax credit. Under the guidance, an entity that meets certain conditions is permitted to make an accounting policy election to amortize the initial cost of its investment in proportion to the tax credits and other tax benefits received and recognize the net investment performance on the statement of operations as a component of income tax expense (benefit). The new guidance is effective for annual periods and interim reporting periods within those annual periods, beginning after December 15, 2014, and should be applied retrospectively to all periods presented. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

Business

“MetLife” or the “Company” refers to MetLife, Inc., a Delaware corporation incorporated in 1999, its subsidiaries and affiliates. MetLife is a leading global provider of insurance, annuities and employee benefit programs throughout the United States, Japan, Latin America, Asia, Europe and the Middle East. MetLife offers life insurance, annuities, property & casualty insurance, and other financial services to individuals, as well as group insurance and retirement & savings products and services to corporations and other institutions.

MetLife is organized into six segments: Retail; Group, Voluntary & Worksite Benefits; Corporate Benefit Funding; and Latin America (collectively, the “Americas”); Asia; and Europe, the Middle East and Africa (“EMEA”).

Basis of Presentation

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to adopt accounting policies and make estimates and assumptions that affect amounts reported in the interim condensed consolidated financial statements. In applying these policies and estimates, management makes subjective and complex judgments that frequently require assumptions about matters that are inherently uncertain. Many of these policies, estimates and related judgments are common in the insurance and financial services industries; others are specific to the Company’s business and operations. Actual results could differ from estimates.

The accompanying interim condensed consolidated financial statements include the accounts of MetLife, Inc. and its subsidiaries, as well as partnerships and joint ventures in which the Company has control, and variable interest entities (“VIEs”) for which the Company is the primary beneficiary. Intercompany accounts and transactions have been eliminated.

Certain international subsidiaries have a fiscal year-end of November 30. Accordingly, the Company’s interim condensed consolidated financial statements reflect the assets and liabilities of such subsidiaries as of February 28, 2014 and November 30, 2013 and the operating results of such subsidiaries for the three months ended February 28, 2014 and 2013.

The Company uses the equity method of accounting for investments in equity securities when it has significant influence or at least 20% interest and for investments in real estate joint ventures and other limited partnership interests (“investees”) when it has more than a minor ownership interest or more than a minor influence over the investee’s operations, but does not have a controlling financial interest. The Company generally recognizes its share of the investee’s earnings on a three-month lag in instances where the investee’s financial information is not sufficiently timely or when the investee’s reporting period differs from the Company’s reporting period. The Company uses the cost method of accounting for investments in which it has virtually no influence over the investee’s operations.

Certain amounts in the prior year periods’ interim condensed consolidated financial statements and related footnotes thereto have been reclassified to conform with the 2014 presentation as discussed throughout the Notes to the Interim Condensed Consolidated Financial Statements.

The accompanying interim condensed consolidated financial statements are unaudited and reflect all adjustments (including normal recurring adjustments) necessary to present fairly the financial position, results of operations and cash flows for the interim periods presented in conformity with GAAP. Interim results are not necessarily indicative of full year performance. The December 31, 2013 consolidated balance sheet data was derived from audited consolidated financial statements included in MetLife, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2013 (the “2013 Annual Report”), filed with the U.S. Securities and Exchange Commission (“SEC”), which include all disclosures required by GAAP. Therefore, these interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements of the Company included in the 2013 Annual Report.

Adoption of New Accounting Pronouncements

Effective January 1, 2014, the Company adopted new guidance regarding reporting of discontinued operations and disclosures of disposals of components of an entity. The guidance increases the threshold for a disposal to qualify as a discontinued operation, expands the disclosures for discontinued operations and requires new disclosures for certain disposals that do not meet the definition of a discontinued operation. Disposals must now represent a strategic shift that has or will have a major effect on the entity’s operations and financial results to qualify as discontinued operations. As discussed in Note 3, the Company has entered into a definitive agreement to sell its wholly-owned subsidiary, MetLife Assurance Limited (“MAL”). As a result of the adoption of this new guidance, the results of operations of MAL and the estimated loss on sale have been included in income from continuing operations.

Effective January 1, 2014, the Company adopted new guidance regarding the presentation of an unrecognized tax benefit. The new guidance requires that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. However, when the carryforwards are not available at the reporting date to settle any additional income taxes that would result from the disallowance of a tax position or the applicable tax law does not require, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit will be presented in the financial statements as a liability and will not be combined with the related deferred tax asset. The adoption was prospectively applied and resulted in a reduction to other liabilities and a corresponding increase to deferred income tax liability in the amount of $277 million.

Effective January 1, 2014, the Company adopted new guidance regarding foreign currency that requires an entity that ceases to have a controlling financial interest in a subsidiary or group of assets within a foreign entity to release any related cumulative translation adjustment into net income. Accordingly, the cumulative translation adjustment should be released into net income only if the sale or transfer results in the complete or substantially complete liquidation of the foreign entity in which the subsidiary or group of assets had resided. For an equity method investment that is a foreign entity, a pro rata portion of the cumulative translation adjustment should be released into net income upon a partial sale of such an equity method investment. The new guidance did not have a material impact on the financial statements upon adoption.

Effective January 1, 2014, the Company adopted new guidance regarding liabilities that requires an entity to measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation within the scope of the guidance is fixed at the reporting date, as the sum of the amount the reporting entity agreed to pay on the basis of its arrangement among its co-obligors and any additional amount the reporting entity expects to pay on behalf of its co-obligors. In addition, the amendments require an entity to disclose the nature and amount of the obligation, as well as other information about the obligation. The new guidance did not have a material impact on the financial statements upon adoption.

Effective January 1, 2014, the Company adopted new guidance on other expenses which address how health insurers should recognize and classify in their income statements fees mandated by the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act. The amendments in this standard specify that the liability for the fee should be estimated and recorded in full once the entity provides qualifying health insurance in the applicable calendar year in which the fee is payable with a corresponding deferred cost that is amortized to expense using the straight-line method of allocation unless another method better allocates the fee over the calendar year that it is payable. In accordance with the adoption of the new accounting pronouncement on January 1, 2014, the Company recorded $57 million in other liabilities, and a corresponding deferred cost, in other assets.

Future Adoption of New Accounting Pronouncements

In January 2014, the Financial Accounting Standards Board issued new guidance regarding investments (Accounting Standards Update 2014-01, Investments — Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects). This guidance is applicable to investments in flow-through limited liability entities that manage or invest in affordable housing projects that qualify for the low-income housing tax credit. Under the guidance, an entity that meets certain conditions is permitted to make an accounting policy election to amortize the initial cost of its investment in proportion to the tax credits and other tax benefits received and recognize the net investment performance on the statement of operations as a component of income tax expense (benefit). The new guidance is effective for annual periods and interim reporting periods within those annual periods, beginning after December 15, 2014, and should be applied retrospectively to all periods presented. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.