Basis of Presentation	6 Months Ended
Jun. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	1. Basis of Presentation Loews Corporation is a holding company. Its subsidiaries are engaged in the following lines of business: commercial property and casualty insurance (CNA Financial Corporation (“CNA”), a 90% owned subsidiary); the operation of offshore oil and gas drilling rigs (Diamond Offshore Drilling, Inc. (“Diamond Offshore”), a 53% owned subsidiary); transportation and storage of natural gas and natural gas liquids and gathering and processing of natural gas (Boardwalk Pipeline Partners, LP (“Boardwalk Pipeline”), a 51% owned subsidiary); and the operation of a chain of hotels (Loews Hotels Holding Corporation (“Loews Hotels”), a wholly owned subsidiary). Unless the context otherwise requires, the terms “Company,” “Loews” and “Registrant” as used herein mean Loews Corporation excluding its subsidiaries and the term “Net income (loss) attributable to Loews Corporation” as used herein means Net income (loss) attributable to Loews Corporation shareholders. In the opinion of management, the accompanying unaudited Consolidated Condensed Financial Statements reflect all adjustments (consisting of only normal recurring accruals) necessary to present fairly the Company’s financial position as of June 30, 2016 and December 31, 2015, results of operations and comprehensive income for the three and six months ended June 30, 2016 and 2015 and changes in shareholders’ equity and cash flows for the six months ended June 30, 2016 and 2015. Net income (loss) for the second quarter and first half of each of the years is not necessarily indicative of net income (loss) for that entire year. These Consolidated Condensed Financial Statements should be read in conjunction with the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015. The Company presents basic and diluted net income (loss) per share on the Consolidated Condensed Statements of Income. Basic net income (loss) per share excludes dilution and is computed by dividing net income (loss) attributable to common stock by the weighted average number of common shares outstanding for the period. Diluted net income per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock. Shares attributable to employee stock-based compensation plans of 4.7 million, 3.7 million, 5.1 million and 3.6 million shares were not included in the diluted weighted average shares amounts for the three and six months ended June 30, 2016 and 2015 because the effect would have been antidilutive. Accounting changes – In April of 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-03, “Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs.” The updated accounting guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, rather than as a deferred asset. As required, the Company’s Consolidated Condensed Balance Sheet has been retrospectively adjusted to reflect the effect of the adoption of the updated accounting guidance, which resulted in a decrease of $23 million in Other assets and Long term debt at December 31, 2015. Recently issued ASUs – In May of 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” The core principle of the new accounting guidance is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The new accounting guidance provides a five-step analysis of transactions to determine when and how revenue is recognized and requires enhanced disclosures about revenue. In August of 2015, the FASB formally amended the effective date of this update to annual reporting periods beginning after December 15, 2017, including interim periods, and it can be adopted either retrospectively or with a cumulative effect adjustment at the date of adoption. The Company is currently evaluating the effect that adopting this new accounting guidance will have on its consolidated financial statements. In May of 2015, the FASB issued ASU 2015-09, “Financial Services – Insurance (Topic 944): Disclosures about Short-Duration Contracts.” The updated accounting guidance requires enhanced disclosures to provide additional information about insurance liabilities for short-duration contracts. The guidance is effective for annual periods beginning after December 15, 2015 and for interim periods beginning after December 15, 2016. The Company is currently evaluating the effect the updated guidance will have on its financial statement disclosures, but expects to provide additional incurred and paid claims development information by accident year, quantitative information about claim frequency and the history of claims duration for significant lines of business within the annual financial statements. In January of 2016, the FASB issued ASU 2016-01, “Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” The updated accounting guidance requires changes to the reporting model for financial instruments. The guidance is effective for interim and annual periods beginning after December 15, 2017. The Company is currently evaluating the effect the guidance will have on its consolidated financial statements, and expects the primary change to be the requirement for equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income (loss). In February of 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” The updated guidance requires lessees to recognize lease assets and lease liabilities for most operating leases. In addition, the updated guidance requires that lessors separate lease and nonlease components in a contract in accordance with the new revenue guidance in ASU 2014-09. The updated guidance is effective for interim and annual periods beginning after December 15, 2018. The Company is currently evaluating the effect the updated guidance will have on its consolidated financial statements. In June of 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” The updated accounting guidance requires changes to the recognition of credit losses on financial instruments not accounted for at fair value through net income (loss). The guidance is effective for interim and annual periods beginning after December 15, 2019. The Company is currently evaluating the effect the guidance will have on its consolidated financial statements, and expects the primary changes to be the use of the expected credit loss model for the mortgage loan portfolio and reinsurance receivables and the presentation of credit losses within the available-for-sale fixed maturities portfolio through an allowance method rather than as a direct write-down. The expected credit loss model will require a financial asset to be presented at the net amount expected to be collected. The allowance method for available-for-sale debt securities will allow the Company to record reversals of credit losses when the estimate of credit losses declines.

1. Basis of Presentation

Loews Corporation is a holding company. Its subsidiaries are engaged in the following lines of business: commercial property and casualty insurance (CNA Financial Corporation (“CNA”), a 90% owned subsidiary); the operation of offshore oil and gas drilling rigs (Diamond Offshore Drilling, Inc. (“Diamond Offshore”), a 53% owned subsidiary); transportation and storage of natural gas and natural gas liquids and gathering and processing of natural gas (Boardwalk Pipeline Partners, LP (“Boardwalk Pipeline”), a 51% owned subsidiary); and the operation of a chain of hotels (Loews Hotels Holding Corporation (“Loews Hotels”), a wholly owned subsidiary). Unless the context otherwise requires, the terms “Company,” “Loews” and “Registrant” as used herein mean Loews Corporation excluding its subsidiaries and the term “Net income (loss) attributable to Loews Corporation” as used herein means Net income (loss) attributable to Loews Corporation shareholders.

In the opinion of management, the accompanying unaudited Consolidated Condensed Financial Statements reflect all adjustments (consisting of only normal recurring accruals) necessary to present fairly the Company’s financial position as of June 30, 2016 and December 31, 2015, results of operations and comprehensive income for the three and six months ended June 30, 2016 and 2015 and changes in shareholders’ equity and cash flows for the six months ended June 30, 2016 and 2015. Net income (loss) for the second quarter and first half of each of the years is not necessarily indicative of net income (loss) for that entire year. These Consolidated Condensed Financial Statements should be read in conjunction with the Consolidated Financial Statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2015.

The Company presents basic and diluted net income (loss) per share on the Consolidated Condensed Statements of Income. Basic net income (loss) per share excludes dilution and is computed by dividing net income (loss) attributable to common stock by the weighted average number of common shares outstanding for the period. Diluted net income per share reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock. Shares attributable to employee stock-based compensation plans of 4.7 million, 3.7 million, 5.1 million and 3.6 million shares were not included in the diluted weighted average shares amounts for the three and six months ended June 30, 2016 and 2015 because the effect would have been antidilutive.

Accounting changes – In April of 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-03, “Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs.” The updated accounting guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, rather than as a deferred asset. As required, the Company’s Consolidated Condensed Balance Sheet has been retrospectively adjusted to reflect the effect of the adoption of the updated accounting guidance, which resulted in a decrease of $23 million in Other assets and Long term debt at December 31, 2015.

Recently issued ASUs – In May of 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” The core principle of the new accounting guidance is that a company should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The new accounting guidance provides a five-step analysis of transactions to determine when and how revenue is recognized and requires enhanced disclosures about revenue. In August of 2015, the FASB formally amended the effective date of this update to annual reporting periods beginning after December 15, 2017, including interim periods, and it can be adopted either retrospectively or with a cumulative effect adjustment at the date of adoption. The Company is currently evaluating the effect that adopting this new accounting guidance will have on its consolidated financial statements.

In May of 2015, the FASB issued ASU 2015-09, “Financial Services – Insurance (Topic 944): Disclosures about Short-Duration Contracts.” The updated accounting guidance requires enhanced disclosures to provide additional information about insurance liabilities for short-duration contracts. The guidance is effective for annual periods beginning after December 15, 2015 and for interim periods beginning after December 15, 2016. The Company is currently evaluating the effect the updated guidance will have on its financial statement disclosures, but expects to provide additional incurred and paid claims development information by accident year, quantitative information about claim frequency and the history of claims duration for significant lines of business within the annual financial statements.

In January of 2016, the FASB issued ASU 2016-01, “Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” The updated accounting guidance requires changes to the reporting model for financial instruments. The guidance is effective for interim and annual periods beginning after December 15, 2017. The Company is currently evaluating the effect the guidance will have on its consolidated financial statements, and expects the primary change to be the requirement for equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income (loss).

In February of 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” The updated guidance requires lessees to recognize lease assets and lease liabilities for most operating leases. In addition, the updated guidance requires that lessors separate lease and nonlease components in a contract in accordance with the new revenue guidance in ASU 2014-09. The updated guidance is effective for interim and annual periods beginning after December 15, 2018. The Company is currently evaluating the effect the updated guidance will have on its consolidated financial statements.

In June of 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” The updated accounting guidance requires changes to the recognition of credit losses on financial instruments not accounted for at fair value through net income (loss). The guidance is effective for interim and annual periods beginning after December 15, 2019. The Company is currently evaluating the effect the guidance will have on its consolidated financial statements, and expects the primary changes to be the use of the expected credit loss model for the mortgage loan portfolio and reinsurance receivables and the presentation of credit losses within the available-for-sale fixed maturities portfolio through an allowance method rather than as a direct write-down. The expected credit loss model will require a financial asset to be presented at the net amount expected to be collected. The allowance method for available-for-sale debt securities will allow the Company to record reversals of credit losses when the estimate of credit losses declines.