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Debt - Carrying Value of Outstanding Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 04, 2015
Jan. 03, 2015
Standby Letters of Credit [Line Items]    
Total debt, current and non-current $ 1,415,567im_DebtCurrentAndNonCurrent $ 1,468,915im_DebtCurrentAndNonCurrent
Short-term debt and current maturities of long-term debt (158,589)us-gaap_DebtCurrent (372,026)us-gaap_DebtCurrent
Long-term debt, less current maturities 1,256,978us-gaap_LongTermDebtNoncurrent 1,096,889us-gaap_LongTermDebtNoncurrent
Senior unsecured notes, 4.95% due 2024    
Standby Letters of Credit [Line Items]    
Total debt, current and non-current 498,299im_DebtCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= im_SeniorUnsecuredNotes4.95PercentDue2024Member
498,255im_DebtCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= im_SeniorUnsecuredNotes4.95PercentDue2024Member
Senior unsecured notes, 5.00% due 2022    
Standby Letters of Credit [Line Items]    
Total debt, current and non-current 298,679im_DebtCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= im_SeniorUnsecuredNotesDueTwoThousandTwentyTwoMember
298,634im_DebtCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= im_SeniorUnsecuredNotesDueTwoThousandTwentyTwoMember
Senior unsecured notes, 5.25% due 2017    
Standby Letters of Credit [Line Items]    
Total debt, current and non-current 300,000im_DebtCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= im_SeniorUnsecuredNotesDueTwoThousandSeventeenMember
300,000im_DebtCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= im_SeniorUnsecuredNotesDueTwoThousandSeventeenMember
North America revolving trade accounts receivable-backed financing program    
Standby Letters of Credit [Line Items]    
Total debt, current and non-current 160,000im_DebtCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= im_NorthAmericaRevolvingTradeAccountsReceivableBackedFinancingProgramMember
185,000im_DebtCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= im_NorthAmericaRevolvingTradeAccountsReceivableBackedFinancingProgramMember
Lines of credit and other debt    
Standby Letters of Credit [Line Items]    
Total debt, current and non-current $ 158,589im_DebtCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= im_LinesOfCreditAndOtherDebtMember
$ 187,026im_DebtCurrentAndNonCurrent
/ us-gaap_DebtInstrumentAxis
= im_LinesOfCreditAndOtherDebtMember