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Alternate caption for the concept is permanent equity.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4568447-111683 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4568740-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4I -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4590271-111686 falseinstant2012-12-31T00:00:000001-01-01T00:00:002Balance at Dec. 31, 201217falseRowperiodPeriod*RowprimaryElement*3false 4us-gaap_SharesOutstandingus-gaap_truenainstantfalsefalsefalsefalsefalsetruefalsefalseperiodStartLabelxbrli:sharesItemTypesharesNumber of shares issued which are neither cancelled nor held in the treasury.No definition available.false1Balance (in shares)duration2013-01-01T00:00:002013-07-06T00:00:00 0us-gaap_SharesOutstandingus-gaap_truenainstantfalsefalsetruefalsefalsetruefalsefalseperiodStartLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7truefalsefalse7920000079.2falsefalsefalse8falsefalsefalse00falsefalsefalsexbrli:sharesItemTypesharesNumber of shares issued which are neither cancelled nor held in the treasury.No definition available.falseinstant2012-12-31T00:00:000001-01-01T00:00:001Balance (in shares) at Dec. 31, 201218falseRowperiodPeriod*RowprimaryElement*4false 4us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterestus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalselabelxbrli:monetaryItemTypemonetaryAmount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 false2Comprehensive income (loss)duration2013-01-01T00:00:002013-07-06T00:00:00 0us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterestus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00  falsefalsefalse2falsefalsefalse00  falsefalsefalse3truefalsefalse-2900000-2.9falsefalsefalse4truefalsefalse-12500000-12.5falsefalsefalse5truefalsefalse6000000.6falsefalsefalse6truefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8truefalsefalse-14800000-14.8falsefalsefalsexbrli:monetaryItemTypemonetaryAmount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. 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