Basis of Presentation (Policies)	3 Months Ended
Mar. 31, 2013
Basis of Presentation
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In December 2011, the Financial Accounting Standards Board, or FASB issued Accounting Standards Update (ASU) 2011-11, Balance Sheet (Topic 210), Disclosures about Offsetting Assets and Liabilities, updated by ASU 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, which requires companies to disclose information about financial instruments that have been offset and related arrangements to enable users of the company’s financial statements to understand the effect of those arrangements on the company’s financial position. Companies will be required to provide both net (offset amounts) and gross information in the notes to the financial statements for relevant assets and liabilities that are offset. ASU 2011-11, as amended by ASU 2013-01, is effective for fiscal years, and interim periods within those years, beginning on or after January 1, 2013. The adoption of this guidance did not have a material effect on our unaudited consolidated financial statements. In July 2012, FASB issued ASU No. 2012-02, Intangibles — Goodwill and Other (Topic 350): Testing Indefinite-Lived Intangible Assets for Impairment. This newly issued accounting standard allows an entity the option to first assess qualitative factors to determine whether it is necessary to perform a quantitative impairment test for indefinite-lived intangibles other than goodwill. Under that option, an entity would no longer be required to calculate the fair value of an indefinite-lived intangible asset unless the entity determines, based on that qualitative assessment, that it is more likely than not that the fair value of the indefinite-lived intangible asset is less than its carrying amount. This ASU is effective for annual and interim indefinite-lived intangible asset impairment tests performed for fiscal years beginning after September 15, 2012. Early adoption is permitted. The adoption of this guidance did not have a material effect on our unaudited consolidated financial statements. In March 2013, FASB issued ASU No. 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for which the Total Amount of the Obligation is Fixed at the Reporting Date, which addresses the recognition, measurement, and disclosure of certain joint and several obligations including debt arrangements, other contractual obligations, and settled litigation and judicial rulings. The ASU is effective for public entities for fiscal years, and interim periods within those years, beginning after December 15, 2013. The adoption of this guidance will not have a material effect on our unaudited consolidated financial statements.

Recently Issued Accounting Pronouncements

In December 2011, the Financial Accounting Standards Board, or FASB issued Accounting Standards Update (ASU) 2011-11, Balance Sheet (Topic 210), Disclosures about Offsetting Assets and Liabilities, updated by ASU 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, which requires companies to disclose information about financial instruments that have been offset and related arrangements to enable users of the company’s financial statements to understand the effect of those arrangements on the company’s financial position. Companies will be required to provide both net (offset amounts) and gross information in the notes to the financial statements for relevant assets and liabilities that are offset. ASU 2011-11, as amended by ASU 2013-01, is effective for fiscal years, and interim periods within those years, beginning on or after January 1, 2013. The adoption of this guidance did not have a material effect on our unaudited consolidated financial statements.

In July 2012, FASB issued ASU No. 2012-02, Intangibles — Goodwill and Other (Topic 350): Testing Indefinite-Lived Intangible Assets for Impairment. This newly issued accounting standard allows an entity the option to first assess qualitative factors to determine whether it is necessary to perform a quantitative impairment test for indefinite-lived intangibles other than goodwill. Under that option, an entity would no longer be required to calculate the fair value of an indefinite-lived intangible asset unless the entity determines, based on that qualitative assessment, that it is more likely than not that the fair value of the indefinite-lived intangible asset is less than its carrying amount. This ASU is effective for annual and interim indefinite-lived intangible asset impairment tests performed for fiscal years beginning after September 15, 2012. Early adoption is permitted. The adoption of this guidance did not have a material effect on our unaudited consolidated financial statements.

In March 2013, FASB issued ASU No. 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for which the Total Amount of the Obligation is Fixed at the Reporting Date, which addresses the recognition, measurement, and disclosure of certain joint and several obligations including debt arrangements, other contractual obligations, and settled litigation and judicial rulings. The ASU is effective for public entities for fiscal years, and interim periods within those years, beginning after December 15, 2013. The adoption of this guidance will not have a material effect on our unaudited consolidated financial statements.