Describe the approximate term of the guarantee or each group of similar guarantees.

No definition available.

Name:	mnk_GuarantorObligationsObligationTerm
Namespace Prefix:	mnk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_EscrowDeposit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsCurrentCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_GuaranteeObligationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)(1)

-URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248

+ Details

Name:	us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Guarantees (Details) (USD $) In Millions, unless otherwise specified				12 Months Ended
	Sep. 26, 2014 Others	Sep. 26, 2014 Maryland Heights, Missouri Surety Bond	Sep. 26, 2014 Saint Louis, Missouri Letter of Credit	Sep. 26, 2014 Mallinckrodt Baker Indemnification Agreement	Sep. 26, 2014 Mallinckrodt Baker Indemnification Agreement Other Liabilities	Sep. 27, 2013 Mallinckrodt Baker Indemnification Agreement Other Liabilities	Sep. 26, 2014 Mallinckrodt Baker Indemnification Agreement Other Assets	Sep. 27, 2013 Mallinckrodt Baker Indemnification Agreement Other Assets	Sep. 26, 2014 Mallinckrodt Baker Enviornmental, Health and Safety Matters Indemnification Agreement Other Liabilities	Sep. 27, 2013 Mallinckrodt Baker Enviornmental, Health and Safety Matters Indemnification Agreement Other Liabilities
Guarantor Obligations [Line Items]
Guarantor obligations, obligation term				17 years
Guarantors obligation					$ 16.6	$ 20.1			$ 13.9	$ 17.2
Maximum future payments	36.2	57.2	21.1	71.4
Escrow				$ 30.0			$ 19.4	$ 23.5