Adoption of New Accounting Pronouncements	12 Months Ended
Dec. 31, 2012
Adoption of New Accounting Pronouncements	(2) Adoption of New Accounting Pronouncements Effective January 1, 2012, the Corporation adopted new guidance issued by the FASB 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. The Corporation elected retrospective application of this guidance under which deferred policy acquisition costs and related deferred income tax liabilities were reduced as of the beginning of the earliest period presented in the financial statements, offset by a cumulative effect adjustment that reduced retained earnings. The adoption of this guidance decreased deferred policy acquisition costs by $420 million, decreased deferred income tax liabilities by $147 million and decreased shareholders’ equity by $273 million as of January 1, 2010. The effect of the adoption of the new guidance on net income for the years ended December 31, 2012, 2011 and 2010 was not material. Amortization of deferred policy acquisition costs and other insurance operating costs and expenses for the years ended December 31, 2011 and 2010 were retrospectively adjusted to conform to the change in accounting guidance. The amounts of the retrospective reductions to previously reported deferred policy acquisition costs, related deferred income tax liabilities and shareholders’ equity as of December 31, 2011 and 2010 were the same as the amounts of the reductions as of January 1, 2010.

(2) Adoption of New Accounting Pronouncements

Effective January 1, 2012, the Corporation adopted new guidance issued by the FASB 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. The Corporation elected retrospective application of this guidance under which deferred policy acquisition costs and related deferred income tax liabilities were reduced as of the beginning of the earliest period presented in the financial statements, offset by a cumulative effect adjustment that reduced retained earnings.

The adoption of this guidance decreased deferred policy acquisition costs by $420 million, decreased deferred income tax liabilities by $147 million and decreased shareholders’ equity by $273 million as of January 1, 2010. The effect of the adoption of the new guidance on net income for the years ended December 31, 2012, 2011 and 2010 was not material. Amortization of deferred policy acquisition costs and other insurance operating costs and expenses for the years ended December 31, 2011 and 2010 were retrospectively adjusted to conform to the change in accounting guidance.

The amounts of the retrospective reductions to previously reported deferred policy acquisition costs, related deferred income tax liabilities and shareholders’ equity as of December 31, 2011 and 2010 were the same as the amounts of the reductions as of January 1, 2010.