MPLX LP - FORM 10-Q - XML - IDEA: XBRL DOCUMENT - December 6, 2012

Recently Adopted

In September 2011, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update giving an entity the option to use a qualitative assessment to determine whether or not the entity is required to perform the two step goodwill impairment test. If, through a qualitative assessment, an entity determines that it is more likely than not that the fair value of a reporting unit is less than the carrying amount, the entity is required to perform the two step goodwill impairment test. The adoption of this accounting standards update in the first quarter of 2012 did not have an impact on our combined results of operations, financial position or cash flows. We perform the annual goodwill impairment testing for our reporting unit in the fourth quarter.

In May 2011, the FASB issued an update amending the accounting standards for fair value measurement and disclosure, resulting in common principles and requirements under U.S. GAAP and International Financial Reporting Standards (“IFRS”). The amendments change the wording used to describe certain of the U.S. GAAP requirements either to clarify the intent of existing requirements, to change measurement or expand disclosure principles or to conform to the wording used in IFRS. The amendments were to be applied prospectively and were effective in interim and annual periods beginning with the first quarter of 2012 with early application not permitted. This accounting standards update was adopted in the first quarter of 2012 and was applied prospectively. The adoption of these amendments did not have a significant impact on our combined results of operations, financial position or cash flows.