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USD ($) / shares
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<p style="margin-top: 6px; margin-bottom: 0px;"><font style="font-family: Times New Roman;" class="_mt" size="2"><b>Basis of Presentation—</b>The Company prepared the accompanying unaudited consolidated financial statements in accordance with accounting principles generally accepted in the United States (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X issued by the Securities and Exchange Commission (SEC). Under those rules, certain footnotes and other financial information that are normally required by GAAP for annual financial statements have been condensed or omitted. The Company is responsible for the financial statements included in Form 10-Q. </font></p>
<p style="margin-top: 12px; margin-bottom: 0px;"><font style="font-family: Times New Roman;" class="_mt" size="2">The consolidated financial statements include all of the normal and recurring adjustments necessary for the fair presentation of the Company's financial position as of March 31, 2011, and December 31, 2010, the results of operations for the three months ended March 31, 2011 and 2010, and its cash flows for the three months ended March 31, 2011 and 2010. Material subsequent events are evaluated for disclosure up to the time of issuance of the financial statements. Intercompany balances and transactions have been eliminated. Revenues, expenses, assets and liabilities can vary during each quarter of the year. Accordingly, the results and trends in these unaudited consolidated financial statements may not be indicative of full year operating results or future performance. </font></p>
<p style="margin-top: 12px; margin-bottom: 0px;"><font style="font-family: Times New Roman;" class="_mt" size="2">The accounting policies used in preparing these consolidated financial statements are the same as those used to prepare the Company's annual report on Form 10-K for the year ended December 31, 2010 (2010 Form 10-K). These unaudited consolidated financial statements and the related notes should be read in conjunction with the audited year end financial statements and accompanying notes included in the Company's 2010 Form 10-K.</font></p></div> </div>Basis of Presentation—The Company prepared the accompanying unaudited consolidated financial statements in accordance with accounting principlesfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDescribes an entity's accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. An entity also may describe its accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 4
-Subparagraph c
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph k
-Article 1
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 5, 6, 16-19
Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02, 03
-Article 3A
Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 2-6
Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 46
Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 20
-Subparagraph a(2)
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-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 4
-Subparagraph d
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-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 97-2
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-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 96-16
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-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 46R
-Paragraph 14, 15
falsefalse4false0mjn_UseOfEstimatesPolicyTextBlockmjnfalsenadurationUse Of Estimates Policy [Text Block]falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> <p style="margin-top: 12px; margin-bottom: 0px;"><font style="font-family: Times New Roman;" class="_mt" size="2"><b>Use of Estimates</b>—The preparation of financial statements in conformity with GAAP requires the use of estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and contingent liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Estimates are used in revenue recognition, including sales rebate and return accruals, goodwill, income tax assets and liabilities, income tax expense, and legal liabilities, as well as the accounting for stock-based compensation costs and retirement and post retirement benefits, including the actuarial assumptions. Actual results may or may not differ from estimated results.</font></p> </div>Use of Estimates—The preparation of financial statements in conformity with GAAP requires the use of estimates and assumptions that affect the reportedfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringUse Of Estimates Policy [Text Block]No authoritative reference available.falsefalse13Accounting Policies (Policy)UnKnownUnKnownUnKnownUnKnownfalsetrue