Recent Accounting Pronouncements	3 Months Ended
Mar. 31, 2013
Recent Accounting Pronouncements	2. Recent Accounting Pronouncements – In January 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2013-01, “Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities.” This ASU amends the scope of FASB ASU No. 2011-11, “Disclosures about Offsetting Assets and Liabilities,” which requires additional disclosure regarding offsetting of assets and liabilities to enable users of financial statements to evaluate the effect or potential effect of netting arrangements on an entity’s financial position. The provisions of the ASUs were effective for annual and interim reporting periods beginning on or after January 1, 2013. Northern Trust’s disclosures under the ASUs are provided in Note 19 – Offsetting Assets and Liabilities. As the ASUs address financial statement disclosures only, their retrospective adoption effective January 1, 2013 did not impact Northern Trust’s consolidated financial position or results of operations. In February 2013, the FASB issued ASU No. 2013-02, “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.” This ASU requires disclosures regarding reclassifications out of accumulated other comprehensive income in a single location in the financial statements. Northern Trust’s components of accumulated other comprehensive income are disclosed in Note 10 – Accumulated Other Comprehensive Income (Loss). Since this ASU addresses prospective financial statement disclosures only, its adoption effective January 1, 2013 did not impact Northern Trust’s consolidated financial position or results of operations.

2. Recent Accounting Pronouncements – In January 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2013-01, “Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities.” This ASU amends the scope of FASB ASU No. 2011-11, “Disclosures about Offsetting Assets and Liabilities,” which requires additional disclosure regarding offsetting of assets and liabilities to enable users of financial statements to evaluate the effect or potential effect of netting arrangements on an entity’s financial position. The provisions of the ASUs were effective for annual and interim reporting periods beginning on or after January 1, 2013. Northern Trust’s disclosures under the ASUs are provided in Note 19 – Offsetting Assets and Liabilities. As the ASUs address financial statement disclosures only, their retrospective adoption effective January 1, 2013 did not impact Northern Trust’s consolidated financial position or results of operations.

In February 2013, the FASB issued ASU No. 2013-02, “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.” This ASU requires disclosures regarding reclassifications out of accumulated other comprehensive income in a single location in the financial statements. Northern Trust’s components of accumulated other comprehensive income are disclosed in Note 10 – Accumulated Other Comprehensive Income (Loss). Since this ASU addresses prospective financial statement disclosures only, its adoption effective January 1, 2013 did not impact Northern Trust’s consolidated financial position or results of operations.