Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2012
Summary of Significant Accounting Policies [Abstract]
Accounting Policies and Basis of Presentation	Accounting Policies and Basis of Presentation: The accompanying consolidated financial statements have been prepared in conformity with the Financial Accounting Standards Board's ("FASB") Accounting Standards Codification ("ASC") of accounting principles generally accepted in the United States of America ("GAAP"). These interim financial statements should be read in conjunction with these notes and those included in the Company's 2011 Annual Report on Form 10-K incorporated herein by reference. Pertinent accounting and disclosure pronouncements issued from time to time by the FASB are adopted by the Company as they become effective. In October 2010, the FASB issued authoritative guidance related to the accounting for costs associated with acquiring or renewing insurance contracts. The guidance identifies those costs relating to the successful acquisition of new or renewal insurance contracts that should be capitalized. This guidance was effective for the Company for the year beginning January 1, 2012 and could be applied prospectively or retrospectively. At year-end 2011, the Company disclosed its expectation to elect retrospective application of the guidance. The Company completed its evaluation of the new guidance during the first quarter 2012 and ultimately elected to adopt the new standard on a prospective basis. The prospective adoption of the guidance resulted in pretax charges of approximately $11 and $22 for the second quarter and first six months of 2012, respectively. In addition, the FASB issued guidance requiring additional disclosures regarding financial instruments disclosed, but not carried, at fair value in the financial statements. The disclosures relative to all these matters are included in the pertinent notes herein. The financial accounting and reporting process relies on estimates and on the exercise of judgment. In the opinion of management all adjustments, consisting only of normal recurring accruals necessary for a fair presentation of the results have been recorded for the interim periods. Amounts shown in the consolidated financial statements and applicable notes are stated (except as otherwise indicated and as to share data) in millions, which amounts may not add to totals shown due to truncation. Necessary reclassifications are made in prior periods' financial statements whenever appropriate to conform to the most current presentation.

Accounting Policies and Basis of Presentation:

The accompanying consolidated financial statements have been prepared in conformity with the Financial Accounting Standards Board's ("FASB") Accounting Standards Codification ("ASC") of accounting principles generally accepted in the United States of America ("GAAP"). These interim financial statements should be read in conjunction with these notes and those included in the Company's 2011 Annual Report on Form 10-K incorporated herein by reference.

Pertinent accounting and disclosure pronouncements issued from time to time by the FASB are adopted by the Company as they become effective. In October 2010, the FASB issued authoritative guidance related to the accounting for costs associated with acquiring or renewing insurance contracts. The guidance identifies those costs relating to the successful acquisition of new or renewal insurance contracts that should be capitalized. This guidance was effective for the Company for the year beginning January 1, 2012 and could be applied prospectively or retrospectively. At year-end 2011, the Company disclosed its expectation to elect retrospective application of the guidance. The Company completed its evaluation of the new guidance during the first quarter 2012 and ultimately elected to adopt the new standard on a prospective basis. The prospective adoption of the guidance resulted in pretax charges of approximately $11 and $22 for the second quarter and first six months of 2012, respectively. In addition, the FASB issued guidance requiring additional disclosures regarding financial instruments disclosed, but not carried, at fair value in the financial statements. The disclosures relative to all these matters are included in the pertinent notes herein.

The financial accounting and reporting process relies on estimates and on the exercise of judgment. In the opinion of management all adjustments, consisting only of normal recurring accruals necessary for a fair presentation of the results have been recorded for the interim periods. Amounts shown in the consolidated financial statements and applicable notes are stated (except as otherwise indicated and as to share data) in millions, which amounts may not add to totals shown due to truncation. Necessary reclassifications are made in prior periods' financial statements whenever appropriate to conform to the most current presentation.