Mallinckrodt (MNKTQ) 10-Q 7 Feb 14 2014 Q1 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	3 Months Ended
	Dec. 27, 2013	Jan. 31, 2014
Document And Entity Information [Abstract]	'	'
Entity Registrant Name	'Mallinckrodt plc	'
Entity Central Index Key	'0001567892	'
Trading Symbol	'MNK	'
Current Fiscal Year End Date	'--09-26	'
Entity Filer Category	'Non-accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	27-Dec-13	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Amendment Flag	'false	'
Ordinary Shares Outstanding	'	58,169,085

Condensed_Consolidated_and_Com

Condensed Consolidated and Combined Statements of Income (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Income Statement [Abstract]	'	'
Net sales	$540.20	$504
Cost of sales	284.6	270.5
Gross profit	255.6	233.5
Selling, general and administrative expenses	146.2	146.8
Research and development expenses	39	38.4
Separation costs	2.2	12
Restructuring charges, net	8	0.2
Gains on divestiture and license	-12.9	-0.7
Operating income	73.1	36.8
Interest expense	-9.8	-0.1
Interest income	0.3	0
Other (expense) income, net	-0.6	0.2
Income from continuing operations before income taxes	63	36.9
Provision for income taxes	16.6	17.1
Income from continuing operations	46.4	19.8
Loss from discontinued operations, net of income taxes	-0.8	-0.6
Net income	$45.60	$19.20
Basic earnings (loss) per share (Note 7):	'	'
Income from continuing operations (in usd per share)	$0.80	$0.34
Loss from discontinued operations (in usd per share)	($0.01)	($0.01)
Net income (in usd per share)	$0.79	$0.33
Basic weighted-averaged shares outstanding (in shares)	57.8	57.7
Diluted earnings (loss) per share (Note 7):	'	'
Income from continuing operations (in usd per share)	$0.79	$0.34
Loss from discontinued operations (in usd per share)	($0.01)	($0.01)
Net income (in usd per share)	$0.78	$0.33
Diluted weighted-average shares outstanding (in shares)	58.4	57.7

Condensed_Consolidated_and_Com1

Condensed Consolidated and Combined Statements of Comprehensive Income (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Statement of Comprehensive Income [Abstract]	'	'
Net income	$45.60	$19.20
Other comprehensive income, net of tax	'	'
Currency translation adjustments	0.4	0.3
Unrecognized gain on derivatives, net of $(0.1) and $- tax	0.1	0
Unrecognized (loss) gain on benefit plans, net of $0.1 and $- tax	-0.3	0.3
Total other comprehensive income, net of tax	0.2	0.6
Comprehensive income	$45.80	$19.80

Consolidated_and_Combined_Stat

Consolidated and Combined Statements of Comprehensive Income (Parenthetical) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Statement of Comprehensive Income [Abstract]	'	'
Unrecognized gain derivatives, tax	($0.10)	$0
Unrecognized gain on benefit plans, tax	$0.10	$0

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Dec. 27, 2013	Sep. 27, 2013
In Millions, unless otherwise specified
Current Assets:	'	'
Cash and cash equivalents	$287.80	$275.50
Accounts receivable, less allowance for doubtful accounts of $5.2 and $4.6	396.8	400.8
Inventories	428.9	403.1
Deferred income taxes	163.5	171.1
Prepaid expenses and other current assets	131.8	134.4
Total current assets	1,408.80	1,384.90
Property, plant and equipment, net	997.3	997.4
Goodwill	532	532
Intangible assets, net	413.3	422.1
Other assets	218	220.2
Total Assets	3,569.40	3,556.60
Current Liabilities:	'	'
Current maturities of long-term debt	1.4	1.5
Accounts payable	144.5	120.9
Accrued payroll and payroll-related costs	32.7	66.5
Accrued branded rebates	37.5	34.6
Accrued and other current liabilities	337.9	376.7
Total current liabilities	554	600.2
Long-term debt	918	918.3
Pension and postretirement benefits	105.9	108
Environmental liabilities	38.7	39.5
Deferred income taxes	317.3	310.1
Other income tax liabilities	149.7	153.1
Other liabilities	176.5	171.8
Total Liabilities	2,260.10	2,301
Shareholders' Equity:	'	'
Preferred shares, $0.20 par value, 500,000,000 authorized; none issued and outstanding	0	0
Ordinary shares, $0.20 par value, 500,000,000 authorized; 58,079,356 and 57,713,873 issued; 58,061,463 and 57,713,390 outstanding	11.6	11.5
Ordinary shares held in treasury at cost, 17,893 and 483	-0.9	0
Additional paid-in capital	1,110.80	1,102.10
Retained earnings	79.1	33.5
Accumulated other comprehensive income	108.7	108.5
Total Shareholders' Equity	1,309.30	1,255.60
Total Liabilities and Shareholders' Equity	$3,569.40	$3,556.60

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 27, 2013	Sep. 27, 2013
In Millions, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Allowance for doubtful accounts	$5.20	$4.60
Preferred shares, par value (in usd per share)	$0.20	$0.20
Preferred shares, shares authorized (in shares)	500,000,000	500,000,000
Preferred shares, issued (in shares)	0	0
Preferred shares, shares outstanding (in shares)	0	0
Ordinary shares, par value (in usd per share)	$0.20	$0.20
Ordinary shares, shares authorized (in shares)	500,000,000	500,000,000
Ordinary shares, shares issued (in shares)	58,079,356	57,713,873
Ordinary stock, shares outstanding (in shares)	58,061,463	57,713,390
Ordinary shares held in treasury (in shares)	17,893	483

Condensed_Consolidated_and_Com2

Condensed Consolidated and Combined Statements of Cash Flows (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Cash Flows From Operating Activities:	'	'
Net income	$45.60	$19.20
Loss from discontinued operations, net of income taxes	0.8	0.6
Income from continuing operations	46.4	19.8
Adjustments to reconcile net cash provided by operating activities:	'	'
Depreciation and amortization	35.1	33.7
Share-based compensation	3.3	3.5
Deferred income taxes	15	1.6
Other non-cash items	-3.8	-1.1
Changes in assets and liabilities, net of the effects of acquisitions:	'	'
Accounts receivable, net	4.9	-2.6
Inventories	-33.2	-41.7
Accounts payable	21.3	0
Income taxes	-8.3	12.1
Accrued and other liabilities	-66.4	-83.4
Other	7.8	-0.9
Net cash provided by (used in) operating activities	22.1	-59
Cash Flows From Investing Activities:	'	'
Capital expenditures	-21.7	-42.8
Acquisition, net of cash acquired	0	-88.1
Restricted cash	4.1	0.5
Other	5	0.2
Net cash (used in) investing activities	-12.6	-130.2
Cash Flows From Financing Activities:	'	'
Repayment of capital leases	-0.3	-0.3
Excess tax benefit from share-based compensation	1.3	1.9
Net transfers to parent	0	187.6
Proceeds from exercise of share options	4.2	0
Repurchase of shares	-0.9	0
Other	-0.1	0
Net cash provided by financing activities	4.2	189.2
Effect of currency rate changes on cash	-1.4	0
Net increase in cash and cash equivalents	12.3	0
Cash and cash equivalents at beginning of period	275.5	0
Cash and cash equivalents at end of period	$287.80	$0

Condensed_Consolidated_Stateme

Condensed Consolidated Statement of Changes in Shareholders' Equity Statement (USD $)	Total	Ordinary Shares	Treasury Shares	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income
In Millions, except Share data
Beginning balance at Sep. 27, 2013	$1,255.60	$11.50	$0	$1,102.10	$33.50	$108.50
Beginning balance, ordinary shares at Sep. 27, 2013	57,713,390	57,700,000	'	'	'	'
Beginning balance, treasury shares at Sep. 27, 2013	483	'	0	'	'	'
Net income	45.6	'	'	'	45.6	'
Currency translation adjustments	0.4	'	'	'	'	0.4
Change in derivatives, net of tax	0.1	'	'	'	'	0.1
Minimum pension liability, net of tax	-0.3	'	'	'	'	-0.3
Share options exercised (in shares)	'	100,000	'	'	'	'
Share options exercised (in usd)	5.5	'	'	5.5	'	'
Vesting of restricted shares (in shares)	'	300,000	'	'	'	'
Vesting of restricted shares (in usd)	'	0.1	'	-0.1	'	'
Share-based compensation	3.3	'	'	3.3	'	'
Repurchase of shares (in usd)	-0.9	'	-0.9	'	'	'
Ending balance at Dec. 27, 2013	$1,309.30	$11.60	($0.90)	$1,110.80	$79.10	$108.70
Ending balance, ordinary shares at Dec. 27, 2013	58,061,463	58,100,000	'	'	'	'
Ending balance, treasury shares at Dec. 27, 2013	17,893	'	0	'	'	'

Background_and_Basis_of_Presen

Background and Basis of Presentation	3 Months Ended
	Dec. 27, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Background and Basis of Presentation	'
	1	Background and Basis of Presentation
	Background
	Mallinckrodt plc, and its subsidiaries (collectively, "Mallinckrodt" or "the Company"), is a global company that develops, manufactures, markets and distributes both branded and specialty generic pharmaceuticals, active pharmaceutical ingredients ("API") and diagnostic imaging agents. These products are found in almost every hospital, standalone diagnostic imaging center or pharmacy in the United States ("U.S.") and the Company has a commercial presence in approximately 70 countries. The Company believes its extensive commercial reach and formulation expertise, coupled with its ability to navigate the highly regulated and technical nature of its business, have created compelling competitive advantages that it anticipates will sustain future revenue growth.
	The Company conducts its business in the following two segments:
	•	Specialty Pharmaceuticals produces and markets branded and specialty generic pharmaceuticals and API, comprised of medicinal opioids, synthetic controlled substances, acetaminophen and other active ingredients; and
	•	Global Medical Imaging develops, manufactures and markets contrast media and delivery systems ("CMDS") and radiopharmaceuticals (nuclear medicine).
	On June 28, 2013, the Pharmaceuticals business of Covidien plc ("Covidien") was transferred to Mallinckrodt plc, thereby completing its legal separation from Covidien ("the Separation"). On July 1, 2013, Mallinckrodt plc began regular way trading on the New York Stock Exchange under the ticker symbol "MNK."
	Basis of Presentation
	The accompanying unaudited condensed consolidated and combined financial statements reflect the consolidated financial results of the Company as an independent, publicly-traded company for the three months ended December 27, 2013 and the consolidated financial position as of December 27, 2013 and September 27, 2013. The three months ended December 28, 2012 reflect the combined results of operations of the Pharmaceutical business of Covidien.
	The unaudited condensed consolidated and combined financial statements have been prepared in U.S. dollars and in accordance with accounting principles generally accepted in the U.S. ("GAAP"). The preparation of the unaudited condensed consolidated and combined financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amount of assets and liabilities, disclosure of contingent assets and liabilities and the reported amounts of revenues and expenses. Actual results may differ from those estimates. The unaudited condensed consolidated and combined financial statements include the accounts of the Company, its wholly-owned subsidiaries and entities in which they own or control more than fifty percent of the voting shares, or have the ability to control through similar rights. The results of entities disposed of are included in the unaudited condensed consolidated and combined financial statements up to the date of disposal and, where appropriate, these operations have been reflected as discontinued operations. Divestitures of product lines not representing businesses have been reflected in operating income. All intercompany balances and transactions have been eliminated in consolidation and, in the opinion of management, all normal recurring adjustments necessary for a fair presentation have been included in the interim results reported. The fiscal year-end balance sheet data were derived from audited consolidated financial statements, but do not include all of the annual disclosures required by GAAP; accordingly, these unaudited condensed consolidated and combined financial statements should be read in conjunction with the Company's audited annual consolidated and combined financial statements included in its Annual Report on Form 10-K filed with the U.S. Securities and Exchange Commission ("the SEC") on December 13, 2013.
	The Company's unaudited condensed combined financial statements for the three months ended December 28, 2012 may not be indicative of its future performance and do not necessarily reflect the results of operations and cash flows that would have been had it operated as an independent, publicly-traded company during that period. The unaudited condensed combined financial statements for the three months ended December 28, 2012 include expense allocations for certain functions provided by Covidien, including, but not limited to, general corporate expenses related to finance, legal, information technology, human resources, communications, employee benefits and incentives, insurance and stock-based compensation. These expenses were allocated to the Company on the basis of direct usage when identifiable, with the remainder allocated on the basis of operating expenses, headcount or other measures. The amounts allocated were $11.9 million during the three months ended December 28, 2012, and were included within selling, general and administrative expenses. Management considers the bases on which the expenses were allocated to reasonably reflect the utilization of services provided to, or the benefit received by, the Company; however, the allocations may not reflect the expense the Company would have incurred as an independent, publicly-traded company during that period. Following the Separation, the Company has performed these functions using its own resources or purchased services, certain of which are being provided by Covidien during a transitional period pursuant to a transition services agreement dated June 28, 2013, between Mallinckrodt and Covidien, particularly in relation to areas outside the U.S. The terms and prices on which such services are rendered may not be as favorable as those that were allocated to the Company by Covidien.
	Fiscal Year
	The Company reports its results based on a "52-53 week" year ending on the last Friday of September. The first fiscal quarters of 2014 and 2013 ended on December 27, 2013 and December 28, 2012, respectively. Fiscal 2013 consisted of 52 weeks and ended on September 27, 2013. Unless otherwise indicated, the three months ended December 27, 2013 refers to the thirteen week period ended December 27, 2013 and the three months ended December 28, 2012 refers to the thirteen week period ended December 28, 2012.

Recently_Issued_Accounting_Sta

Recently Issued Accounting Standards Recently Issued Accounting Standards	3 Months Ended
	Dec. 27, 2013
Recently Issued Accounting Pronouncements [Abstract]	'
Recently Issued Accounting Standards	'
	2	Recently Issued Accounting Standards
	The Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2011-11 in December 2011, "Disclosures about Offsetting Assets and Liabilities," which was clarified in January 2013 by ASU 2013-01 "Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities." This guidance provides new disclosure requirements about instruments and transactions eligible for offset in the statement of financial position, as well as instruments and transactions subject to an agreement similar to a netting agreement, to enable users of financial statements to understand the effects or potential effects of those arrangements on an entity's financial position. The guidance was effective for the Company in the first quarter of fiscal 2014. The adoption did not have a material impact on the Company's financial condition, results of operations and cash flows.
	FASB issued ASU 2013-02, "Reporting Amounts Classified out of Accumulated Other Comprehensive Income," in February 2013. This guidance requires an entity to present, either on the face of the statement of income or separately in the notes to the financial statements, the effects on net income of significant amounts reclassified out of each component of accumulated other comprehensive income, if those amounts are required to be reclassified to net income in their entirety in the same reporting period. For other amounts not required to be reclassified to net income in their entirety, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. The guidance was effective for the Company in the first quarter of fiscal 2014. The adoption did not have a material impact on the Company's financial condition, results of operations and cash flows.
	FASB issued ASU 2013-04, "Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation Is Fixed at the Reporting Date," in February 2013. This update provides guidance for the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date, except for obligations addressed within existing guidance. An entity is required to measure those obligations as the sum of the amount the entity has agreed to pay on the basis of its arrangement among its co-obligors, and any additional amounts it expects to pay on behalf of its co-obligors. The guidance also requires the entity to disclose the nature and amount of those obligations. The guidance is effective for the Company in the first quarter of fiscal 2015. The Company is still assessing the impact of the pronouncement but does not expect it will have a material impact on its financial condition, results of operations and cash flows.

License_of_Intellectual_Proper

License of Intellectual Property	3 Months Ended
	Dec. 27, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
License of Intellectual Property	'
	3	License of Intellectual Property
	The Company was involved in patent disputes with a counterparty relating to certain intellectual property relevant to extended release oxymorphone. In December 2013, the counterparty agreed to pay the Company an upfront cash payment of $4.0 million and contractually obligated future payments of $8.0 million through July 2018, in exchange for the withdrawl of all claims associated with the intellectual property and a license to utilize the Company's intellectual property. The Company has completed the earnings process associated with the agreement and, recorded an $11.7 million gain, included within gains on divestitures and license, during the three months ended December 27, 2013.

Acquisitions

Acquisitions	3 Months Ended
	Dec. 27, 2013
Acquisitions [Abstract]	'
Acquisitions	'
	4	Acquisitions
	CNS Therapeutics
	On October 1, 2012, the Company's Specialty Pharmaceuticals segment acquired all the outstanding equity of CNS Therapeutics, Inc. ("CNS Therapeutics"), a specialty pharmaceuticals company focused on developing and commercializing intrathecal products for site-specific administration to the central nervous system to treat neurological disorders and intractable chronic pain, for total consideration of $95.0 million. The total consideration was comprised of an upfront cash payment of $88.1 million (net of cash acquired of $3.6 million) and the fair value of contingent consideration of $6.9 million. This contingent consideration, which could potentially total a maximum of $9.0 million, is discussed further in Note 18. The acquisition of CNS Therapeutics expanded the Company's branded pharmaceuticals portfolio and supports the Company's strategy of leveraging its therapeutic expertise and core capabilities in manufacturing, regulatory and commercialization to serve patients. With the acquisition, the Company now offers products for use in the management of severe spasticity of cerebal or spinal origin with a research and development pipeline of an additional presentation and concentration of GABLOFEN® (baclofen injection) ("Gablofen"), as well as other investigational pain products for intrathecal administration.
	The following amounts represent the final allocation of the fair value of the identifiable assets acquired and liabilities assumed:
	Current assets (1)	$	13.3
	Intangible assets	91.9
	Goodwill (non-tax deductible) (2)	24.5
	Total assets acquired	129.7
	Current liabilities	4
	Deferred tax liabilities, net (non-current)	27.1
	Contingent consideration (non-current)	6.9
	Total liabilities assumed	38
	Net assets acquired	$	91.7
	-1	This amount includes $3.3 million of accounts receivable, which is also the gross contractual value. As of the acquisition date, the fair value of accounts receivable approximated carrying value.
	-2	Goodwill relates to the Company's ability to exploit CNS Therapeutics' technologies.
	The following reconciles the total consideration to net assets acquired:
	Total consideration	$	95
	Plus: cash assumed in acquisition	3.6
	Less: contingent consideration	(6.9		)
	Net assets acquired	$	91.7
	Intangible assets acquired consist of the following:
		Amount			Weighted-Average Amortization Period
	Completed technology	$	73.1		13 years
	Trademark	0.2			3 years
	In-process research and development	18.6			Non-Amortizable
		$	91.9
	The in-process research and development projects primarily relate to certain investigational intrathecal pain products. As of the date of acquisition, these pain products were in various stages of development, with further development, testing, clinical trials and regulatory submission required in order to bring them to market. At the acquisition date, the total cost to complete these products was estimated to be approximately $18.0 million. The Company expects that regulatory approvals will occur between 2015 and 2018. The valuation of the in-process research and development was determined using, among other factors, appraisals primarily based on the discounted cash flow method. The cash flows were discounted at a 35% rate, which was considered commensurate with the risks and stages of development of the pain products. Future residual cash flows that could be generated from the products were determined based upon management's estimate of future revenue and expected profitability of the products. These projected cash flows were then discounted to their present values taking into account management's estimate of future expenses that would be necessary to bring the products to completion.
	The consolidated and combined statements of income for the three months ended December 27, 2013 and December 28, 2012 contained $7.6 million and $6.5 million, respectively, of net sales of intrathecal products added to the Company's portfolio from the CNS Therapeutics acquisition. Acquisition and integration costs included in the periods presented were not material.

Restructuring_and_Related_Char

Restructuring and Related Charges	3 Months Ended
	Dec. 27, 2013
Restructuring and Related Activities [Abstract]	'
Restructuring and Related Charges	'
	5	Restructuring and Related Charges
	During fiscal 2013, the Company launched a restructuring program designed to improve its cost structure ("the 2013 Mallinckrodt Program"). The 2013 Mallinckrodt Program includes actions across both segments, as well as within corporate functions. The Company expects to incur charges of $100.0 million to $125.0 million under this program as the specific actions required to execute on these initiatives are identified and approved, most of which are expected to be incurred by the end of fiscal 2016.
	Prior to Separation, Covidien initiated restructuring programs, which also applied to its Pharmaceutical business. Restructuring actions associated with acquisitions made prior to the Separation are included within Other programs below. These programs were substantially completed as of September 27, 2013.
	Net restructuring and related charges by segment were as follows:
		Three Months Ended
		December 27,			December 28,
		2013			2012
	Specialty Pharmaceuticals	$	—		$	0.7
	Global Medical Imaging	8.1			0.3
	Restructuring and related charges, net	8.1			1
	Less: accelerated depreciation	(0.1		)	(0.8		)
	Restructuring charges, net	$	8		$	0.2
	Net restructuring and related charges were comprised of the following:
		Three Months Ended
		December 27,			December 28,
		2013			2012
	2013 Mallinckrodt Program	$	8.3		$	—
	Other programs	(0.2		)	1
	Total programs	8.1			1
	Less: non-cash charges, including accelerated depreciation	(0.1		)	(0.9		)
	Total charges expected to be settled in cash	$	8		$	0.1
	The following table summarizes cash activity for restructuring reserves, substantially all of which related to employee severance and benefits:
		2013 Mallinckrodt Program			Other Programs			Total
	Balance at September 27, 2013	$	14.9		$	10.6		$	25.5
	Charges	10.2			0.3			10.5
	Changes in estimate	(2.0		)	(0.5		)	(2.5		)
	Cash payments	(2.2		)	(3.7		)	(5.9		)
	Balance at December 27, 2013	$	20.9		$	6.7		$	27.6
	Net restructuring and related charges, including associated asset impairments, incurred cumulative to date related to the 2013 Mallinckrodt Program were as follows:
	Specialty Pharmaceuticals	$	2.4
	Global Medical Imaging	17.6
	Corporate	3
		$	23
	Substantially all of the restructuring reserves were included in accrued and other current liabilities on the Company's unaudited condensed consolidated balance sheets.

Income_Taxes_Notes

Income Taxes (Notes)	3 Months Ended
	Dec. 27, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	6	Income Taxes
	Income tax expense was $16.6 million on income from continuing operations before income taxes of $63.0 million for the three months ended December 27, 2013 and $17.1 million on income from continuing operations before income taxes of $36.9 million for the three months ended December 28, 2012. This resulted in effective tax rates of 26.3% and 46.3% for the three months ended December 27, 2013 and December 28, 2012, respectively. The effective tax rates were impacted by the deductibility of separation costs, due to the tax free status of the Separation. During the three months ended December 27, 2013, the Company received a $0.7 million tax benefit on $2.2 million of separation costs compared with a $0.3 million tax benefit on $12.0 million of separation costs for the three months ended December 28, 2012. Furthermore, the Company's effective tax rate for the three months ended December 28, 2012 reflected the business as historically managed by Covidien rather than as an independent, publicly-traded company.
	The Company's unrecognized tax benefits, excluding interest, totaled $100.7 million at December 27, 2013 and $100.1 million at September 27, 2013. The net increase of $0.6 million primarily resulted from increases to prior period tax positions of $4.3 million, current year activity of $0.5 million and reductions to unrecognized tax benefits as a result of the lapse of the applicable statutes of limitation of $4.2 million. Included within the $100.7 million of total unrecognized tax benefits at December 27, 2013, there were $96.9 million of unrecognized tax benefits, which if favorably settled would benefit the effective tax rate. The total amount of accrued interest related to these obligations was $58.3 million at December 27, 2013 and $62.1 million at September 27, 2013.
	It is reasonably possible that within the next twelve months, as a result of the resolution of various federal, state and foreign examinations and appeals, additions related to prior period tax positions, and the expiration of various statutes of limitation, that the unrecognized tax benefits may decrease by up to $11.1 million and the amount of interest and penalties may decrease by up to $12.5 million.

Earnings_Loss_per_Share

Earnings (Loss) per Share	3 Months Ended
	Dec. 27, 2013
Earnings (Loss) per Share [Abstract]	'
Earnings (Loss) per Share	'
	7	Earnings (Loss) per Share
	Basic earnings (loss) per share is computed by dividing net income by the number of weighted-average shares outstanding during the period. Diluted earnings (loss) per share is computed using the weighted-average shares outstanding and, if dilutive, potential ordinary shares outstanding during the period. Potential ordinary shares represents the incremental ordinary shares issuable for restricted share units and share option exercises. The Company calculates the dilutive effect of outstanding restricted share units and share options on earnings (loss) per share by application of the treasury stock method.
	The computations of basic and diluted earnings (loss) per share assumes that the number of shares outstanding for periods prior to June 28, 2013 was equal to the number of ordinary shares of Mallinckrodt outstanding on June 28, 2013, immediately following the distribution of one ordinary share of Mallinckrodt for every eight ordinary shares of Covidien. The dilutive effect of the Company's share-based awards that were issued as a result of the conversion of Covidien share-based awards with the Separation, the initial equity awards granted to certain of the Company's executives on July 1, 2013 and any other Company grants made since the Separation have been included in the computation of diluted earnings per share for the three months ended December 27, 2013, weighted appropriately for the portion of the period they were outstanding.
		Three months ended
		December 27, 2013	December 28, 2012
	Weighted-average shares for basic earnings (loss) per share	57.8	57.7
	Effect of share options and restricted shares	0.6	—
	Weighted-average shares for diluted earnings (loss) per share	58.4	57.7
	The computation of diluted earnings per share for the three months ended December 27, 2013 excludes less than 0.1 million of equity awards because the effect of which would have been anti-dilutive.

Inventories

Inventories	3 Months Ended
	Dec. 27, 2013
Inventory, Net [Abstract]	'
Inventories	'
	8	Inventories
	Inventories were comprised of the following at the end of each period:
		December 27,		September 27,
		2013		2013
	Raw materials and supplies	$	84.6	$	68.8
	Work in process	212.6		191.5
	Finished goods	131.7		142.8
		$	428.9	$	403.1

Property_Plant_and_Equipment

Property, Plant and Equipment	3 Months Ended
	Dec. 27, 2013
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment	'
	9	Property, Plant and Equipment
	The gross carrying amount and accumulated depreciation of property, plant and equipment at the end of each period was as follows:
		December 27, 2013			September 27, 2013
	Property, plant and equipment, gross	$	1,896.30		$	1,873.70
	Less: accumulated depreciation	(899.0		)	(876.3		)
	Property, plant and equipment, net	$	997.3		$	997.4
	Depreciation expense for property, plant and equipment was $26.3 million and $24.8 million during the three months ended December 27, 2013 and December 28, 2012, respectively. Depreciation expense included depreciation on demonstration equipment of $1.1 million and $0.8 million for the three months ended December 27, 2013 and December 28, 2012, respectively. Demonstration equipment was included within other assets on the unaudited condensed consolidated balance sheets.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	3 Months Ended
	Dec. 27, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	10	Goodwill and Intangible Assets
	The carrying amount of goodwill by segment for the periods presented was as follows:
		27-Dec-13		27-Sep-13
	Specialty Pharmaceuticals	$	312.3	$	312.3
	Global Medical Imaging	219.7		219.7
		$	532	$	532
	The gross carrying amount and accumulated amortization of intangible assets at the end of each period were as follows:
		27-Dec-13				27-Sep-13
		Gross		Accumulated		Gross		Accumulated
		Carrying		Amortization		Carrying		Amortization
		Amount				Amount
	Amortizable:
	Completed technology	$	449.2	$	202.2	$	449.2	$	196.6
	Licenses	191.1		82.4		191.1		79.3
	Trademarks	7.9		3.9		7.9		3.8
	Total	$	648.2	$	288.5	$	648.2	$	279.7
	Non-Amortizable:
	Trademarks	$	35			$	35
	In-process research and development	18.6				18.6
	Total	$	53.6			$	53.6
	Intangible asset amortization expense was $8.8 million and $8.9 million during the three months ended December 27, 2013 and December 28, 2012, respectively. The estimated aggregate amortization expense on intangible assets owned by the Company is expected to be as follows:
	Remainder of fiscal 2014	$	26.6
	Fiscal 2015	35.4
	Fiscal 2016	35.3
	Fiscal 2017	33.9
	Fiscal 2018	25.2

Debt

Debt	3 Months Ended
	Dec. 27, 2013
Debt Disclosure [Abstract]	'
Debt	'
	11	Debt
	Debt was comprised of the following at the end of each period:
		27-Dec-13		September 27, 2013
	Current maturities of long-term debt:
	Capital lease obligation	$	1.4	$	1.4
	Loan payable	—		0.1
	Total current debt	1.4		1.5
	Long-term debt:
	3.50% notes due April 2018	299.9		299.9
	9.50% debentures due May 2022	10.4		10.4
	8.00% debentures due March 2023	8		8
	4.75% notes due April 2023	598.2		598.2
	Capital lease obligation	1.5		1.8
	Total long-term debt	918		918.3
	Total debt	$	919.4	$	919.8
	In March 2013, Mallinckrodt International Finance S.A. ("MIFSA"), a subsidiary of the Company, entered into a $250.0 million five-year senior unsecured revolving credit facility that matures in June 2018 ("the Credit Facility"). Borrowings under the Credit Facility bear interest at LIBOR plus 1.50% per annum (subject to adjustment pursuant to a ratings-based pricing grid). The Credit Facility contains a $150.0 million letter of credit sublimit. The Credit Facility is subject to an initial annual facility fee of 0.25%, which is also subject to adjustment pursuant to a ratings-based pricing grid, and the fee applied to outstanding letters of credit is based on the interest rate applied to borrowings. The Credit Facility agreement contains customary affirmative and negative covenants. MIFSA's obligations under the Credit Facility are guaranteed by Mallinckrodt plc. As of December 27, 2013, there were no borrowings or letters of credit outstanding under the Credit Facility.
	In April 2013, MIFSA issued and sold in a private placement $300.0 million aggregate principal amount of 3.50% senior unsecured notes due April 2018 and $600.0 million aggregate principal amount of 4.75% senior unsecured notes due April 2023 (collectively, "the Notes"). In connection with the initial offering, MIFSA entered into a registration rights agreement with the initial purchasers in which MIFSA agreed, among other things, to register the Notes with the SEC within one year of the issuance of the Notes. On January 16, 2014, MIFSA filed this registration statement, which has not yet been declared effective. The Notes are subject to an indenture which contains customary affirmative and negative covenants. Mallinckrodt plc has fully and unconditionally guaranteed the Notes on an unsecured and unsubordinated basis. MIFSA pays interest on the Notes semiannually in arrears on April 15 and October 15 of each year.
	As of December 27, 2013, the Company was, and expects to remain, in compliance with the provisions and covenants associated with its Credit Agreement, the Notes and its other debt agreements.

Retirement_Plans

Retirement Plans	3 Months Ended
	Dec. 27, 2013
Compensation and Retirement Disclosure [Abstract]	'
Retirement Plans	'
	12	Retirement Plans
	The net periodic benefit cost for the Company's defined benefit pension plans was as follows:
		Three Months Ended
		December 27,			December 28,
		2013			2012
	Service cost	$	1.3		$	1.2
	Interest cost	4.9			4.6
	Expected return on plan assets	(6.1		)	(7.4		)
	Amortization of net actuarial loss	2.1			3
	Amortization of prior service (credit) cost	(0.1		)	0.1
	Net periodic benefit cost	$	2.1		$	1.5
	The net periodic benefit credit for postretirement benefit plans for the three months ended December 27, 2013 and December 28, 2012 was $1.8 million and $1.6 million, respectively. The components of the credit were not material.
	During the three months ended December 28, 2012, Covidien made a $37.5 million voluntary contribution to the Company's pension plans. The Company may elect to make voluntary contributions to its defined benefit pension plans or its postretirement benefit plans during fiscal 2014.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income	3 Months Ended
	Dec. 27, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Accumulated Other Comprehensive Income	'
	13	Accumulated Other Comprehensive Income
	The components of accumulated other comprehensive income were as follows:
		Currency Translation			Unrecognized Gain (Loss) on Derivatives			Unrecognized Gain (Loss) on Benefit Plans			Accumulated Other Comprehensive Income
	Balance at September 27, 2013	$	158.6		$	(7.3	)	$	(42.8	)	$	108.5
	Other comprehensive income before reclassifications	0.4			—			—			0.4
	Amounts reclassified from accumulated other comprehensive income	—			0.1			(0.3		)	(0.2		)
	Net current period other comprehensive income	0.4			0.1			(0.3		)	0.2
	Balance at December 27, 2013	$	159		$	(7.2	)	$	(43.1	)	$	108.7
	The following summarizes reclassifications out of accumulated other comprehensive income for the three months ended December 27, 2013:
		Amount Reclassified from Accumulated Other Comprehensive Income			Line Item in the Unaudited Condensed Consolidated
					Statement of Income
	Amortization of unrealized gain on derivatives	$	0.2		Interest expense
	Income tax provision	(0.1		)	Provision for income taxes
	Net of income taxes	0.1
	Amortization of pension and post-retirement benefit plans:
	Net actuarial loss	2.1			(1)
	Prior service cost	(2.5		)	(1)
	Total before tax	(0.4		)
	Income tax provision	0.1			Provision for income taxes
	Net of income taxes	(0.3		)
	Total reclassifications for the period	$	(0.2	)
	-1	These accumulated other comprehensive income components are included in the computation of net periodic benefit cost. See Note 12 for additional details.

Transactions_with_Former_Paren

Transactions with Former Parent Company	3 Months Ended
	Dec. 27, 2013
Related Party Transactions [Abstract]	'
Transactions with Former Parent Company	'
	14	Transactions with Former Parent Company
	Prior to the completion of the Separation on June 28, 2013, the Company was part of Covidien and, as such, transactions between Covidien and the Company were considered related party transactions. These intercompany transactions were included in the unaudited condensed combined financial statements for the three months ended December 28, 2012, and were considered to be effectively settled for cash at the time the transactions were recorded. The continuing relationship between Covidien and the Company is primarily governed through agreements entered into as part of the Separation, including a separation and distribution agreement, a tax matters agreement and a transition services agreement. These agreements were filed with the SEC as Exhibits 2.1, 10.1 and 10.3, respectively, to the Company's Current Report on Form 8-K filed on July 1, 2013. For further discussion on these agreements and other historical related party transactions, refer to the Company's Annual Report on Form 10-K filed with the SEC on December 13, 2013.
	Sales and Purchases
	During the three months ended December 27, 2013 and December 28, 2012, the Company sold inventory to Covidien in the amount of $12.1 million and $14.1 million, respectively, which is included in net sales in the unaudited condensed consolidated and combined statements of income. The Company also purchases inventories from Covidien. The Company recognized cost of sales from these inventory purchases of $10.0 million and $12.9 million during the three months ended December 27, 2013 and December 28, 2012.
	Allocated Expenses
	As discussed in Note 1, the unaudited condensed combined financial statements for the three months ended December 28, 2012 included expense allocations for certain functions provided by Covidien, including, but not limited to, general corporate expenses related to finance, legal, information technology, human resources, communications, employee benefits and incentives, insurance and share-based compensation. These expenses were allocated to the Company on the basis of direct usage when identifiable, with the remainder allocated on the basis of operating expenses, headcount or other measures. The amounts allocated were $11.9 million during the three months ended December 28, 2012, and were included within selling, general and administrative expenses.
	Balance Sheet Impacts
	Subsequent to the Separation, the Company and Covidien maintain an ongoing relationship in which each party may provide services to the other party, including the distribution of goods. As a result of these relationships, the unaudited condensed consolidated balance sheets as of December 27, 2013 and September 27, 2013 included $66.2 million and $62.2 million, respectively, of amounts due to the Company from Covidien, within prepaid expenses and other current assets, and $72.7 million and $79.3 million, respectively, of amounts the Company owes Covidien, included within accrued and other liabilities.

Guarantees

Guarantees	3 Months Ended
	Dec. 27, 2013
Guarantees [Abstract]	'
Guarantees	'
	15	Guarantees
	In disposing of assets or businesses, the Company has historically provided representations, warranties and indemnities to cover various risks and liabilities, including unknown damage to the assets, environmental risks involved in the sale of real estate, liability to investigate and remediate environmental contamination at waste disposal sites and manufacturing facilities, and unidentified tax liabilities related to periods prior to disposition. The Company assesses the probability of potential liabilities related to such representations, warranties and indemnities and adjusts potential liabilities as a result of changes in facts and circumstances. The Company believes, given the information currently available, that their ultimate resolution will not have a material adverse effect on its financial condition, results of operations and cash flows.
	In connection with the sale of the Specialty Chemicals business (formerly known as Mallinckrodt Baker) in fiscal 2010, the Company agreed to indemnify the purchaser with respect to various matters, including certain environmental, health, safety, tax and other matters. The indemnification obligations relating to certain environmental, health and safety matters have a term of 17 years from the sale, while some of the other indemnification obligations have an indefinite term. The amount of the liability relating to all of these indemnification obligations included in other liabilities on the Company's unaudited condensed consolidated balance sheets as of December 27, 2013 and September 27, 2013 was $16.8 million and $20.1 million, respectively, of which $13.9 million and $17.2 million, respectively, related to environmental, health and safety matters. The value of the environmental, health and safety indemnity was measured based on the probability-weighted present value of the costs expected to be incurred to address environmental, health and safety claims made under the indemnity. The aggregate fair value of these indemnification obligations did not differ significantly from their aggregate carrying value at December 27, 2013 and September 27, 2013. As of December 27, 2013, the maximum future payments the Company could be required to make under these indemnification obligations was $71.4 million. The Company was required to pay $30.0 million into an escrow account as collateral to the purchaser, of which $19.4 million and $23.5 million remained in other assets on the unaudited condensed consolidated balance sheets at December 27, 2013 and September 27, 2013, respectively.
	The Company has recorded liabilities for known indemnification obligations included as part of environmental liabilities, which are discussed in Note 16. In addition, the Company is liable for product performance; however, the Company believes, given the information currently available, that their ultimate resolution will not have a material adverse effect on its financial condition, results of operations and cash flows.
	The Company is required to provide the U.S. Nuclear Regulatory Commission financial assurance demonstrating its ability to fund the decommissioning of its Maryland Heights, Missouri radiopharmaceuticals production facility upon closure, though the Company does not intend to close this facility. The Company has provided this financial assurance in the form of a $58.0 million surety bond.
	In addition, as of December 27, 2013, the Company had a $21.1 million letter of credit to guarantee decommissioning costs associated with its Saint Louis, Missouri plant. As of December 27, 2013, the Company had various other letters of credit and guarantee and surety bonds totaling $32.7 million.
	In addition, the separation and distribution agreement entered into with Covidien at the Separation provides for cross-indemnities principally designed to place financial responsibility of the obligations and liabilities of the Company's business with the Company and financial responsibility for the obligations and liabilities of Covidien's remaining business with Covidien, among other indemnities.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Dec. 27, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	16	Commitments and Contingencies
	The Company is subject to various legal proceedings and claims, including patent infringement claims, product liability matters, environmental matters, employment disputes, contractual disputes and other commercial disputes, including those described below. The Company believes that these legal proceedings and claims likely will be resolved over an extended period of time. Although it is not feasible to predict the outcome of these matters, the Company believes, given the information currently available, that their ultimate resolution will not have a material adverse effect on its financial condition, results of operations and cash flows.
	Governmental Proceedings
	On November 30, 2011 and October 22, 2012, the Company received subpoenas from the U.S. Drug Enforcement Administration requesting production of documents relating to its suspicious order monitoring programs. The Company is complying as required by the terms of the subpoenas. While it is not possible at this time to determine with certainty the outcome of these proceedings, the Company believes, given the information currently available, that their ultimate resolution will not have a material adverse effect on its financial condition, results of operations and cash flows.
	Patent/Antitrust Litigation
	Tyco Healthcare Group LP, et al. v. Mutual Pharmaceutical Company, Inc. The Company filed a patent infringement suit in the U.S. District Court for the District of New Jersey against Mutual Pharmaceutical Co., Inc., et al. (collectively, "Mutual") on March 20, 2007 pursuant to procedures set out in the Drug Price Competition and Patent Term Restoration Act of 1984, after Mutual submitted an Abbreviated New Drug Application to the U.S. Food and Drug Administration ("FDA") seeking to sell a generic version of the Company's 7.5mg RESTORIL™ sleep aid product. Mutual also filed antitrust and unfair competition counterclaims. The patents at issue have since expired or been found invalid. On January 18, 2013, the trial court issued an opinion and order granting the Company's motion for summary judgment regarding Mutual's antitrust and unfair competition counterclaims. On May 1, 2013, Mutual appealed this decision to the U.S. Court of Appeals for the Federal Circuit and oral arguments were heard on February 6, 2014. While it is not possible at this time to determine with certainty the ultimate outcome of the counterclaims, the Company believes, given the information currently available, that their ultimate resolution will not have a material adverse effect on its financial condition, results of operations and cash flows.
	Pricing Litigation
	State of Utah v. Actavis US, Inc., et al. The Company, along with numerous other pharmaceuticals companies, are defendants in this matter which was filed May 8, 2008, and is pending in the Third Judicial Circuit of Salt Lake County, Utah. The State of Utah alleges, generally, that the defendants reported false pricing information in connection with certain drugs that are reimbursable under Medicaid, resulting in overpayment by state Medicaid programs for those drugs, and is seeking monetary damages and attorneys' fees. The Company believes that it has meritorious defenses to these claims and is vigorously defending against them. While it is not possible at this time to determine with certainty the outcome of the case, the Company believes, given the information currently available, that their ultimate resolution will not have a material adverse effect on its financial condition, results of operations and cash flows.
	Environmental Remediation and Litigation Proceedings
	The Company is involved in various stages of investigation and cleanup related to environmental remediation matters at a number of sites, including those described below. The ultimate cost of site cleanup and timing of future cash outlays is difficult to predict, given the uncertainties regarding the extent of the required cleanup, the interpretation of applicable laws and regulations and alternative cleanup methods. The Company concluded that, as of December 27, 2013, it was probable that it would incur remedial costs in the range of $44.5 million to $80.3 million. The Company also concluded that, as of December 27, 2013, the best estimate within this range was $44.5 million, of which $5.8 million was included in accrued and other current liabilities and the remainder was included in environmental liabilities on the unaudited condensed consolidated balance sheet at December 27, 2013.
	Crab Orchard National Wildlife Refuge Superfund Site, near Marion, Illinois. The Company is a successor in interest to International Minerals and Chemicals Corporation ("IMC"). Between 1967 and 1982, IMC leased portions of the Additional and Uncharacterized Sites ("AUS") Operable Unit at the Crab Orchard Superfund Site ("the Site") from the government and manufactured various explosives for use in mining and other operations. In March 2002, the Department of Justice, the U.S. Department of the Interior and the U.S. Environmental Protection Agency ("EPA") (together, "the Government Agencies") issued a special notice letter to General Dynamics Ordnance and Tactical Systems, Inc. ("General Dynamics"), one of the other potentially responsible parties ("PRPs") at the Site, to compel General Dynamics to perform the remedial investigation and feasibility study ("RI/FS") for the AUS Operable Unit. General Dynamics negotiated an Administrative Order on Consent with the Government Agencies to conduct an extensive RI/FS at the Site under the direction of the U.S. Fish and Wildlife Service. General Dynamics asserted in August 2004 that the Company is jointly and severally liable, along with approximately eight other lessees and operators at the AUS Operable Unit, for alleged contamination of soils and groundwater resulting from historic operations, and has threatened to file a contribution claim against the Company and other parties for recovery of its costs incurred in connection with the RI/FS activities being conducted at the AUS Operable Unit. The Company and other PRPs who received demand letters from General Dynamics have explored settlement alternatives, but have not reached settlement to date. The Company and other PRPs are awaiting completion of the RI/FS by General Dynamics before the initiation of formal PRP negotiations to address resolution of these alleged claims. While it is not possible at this time to determine with certainty the ultimate outcome of this case, the Company believes, given the information currently available, that the final resolution of all known claims, after taking into account amounts already accrued, will not have a material adverse effect on its financial condition, results of operations and cash flows.
	Mallinckrodt Veterinary, Inc., Millsboro, Delaware. The Company previously operated a plant in Millsboro, Delaware ("the Millsboro Site") that manufactured various animal healthcare products. In 2005, the Delaware Department of Natural Resources and Environmental Control found trichloroethylene ("TCE") in the Millsboro public water supply at levels that exceeded the federal drinking water standards. Further investigation to identify the TCE plume in the ground water indicated that the plume has extended to property owned by a third party near the Millsboro Site. The Company, and other former owners, assumed responsibility for the Millsboro Site cleanup under the Alternative Superfund Program administered by the EPA. The Company and other PRPs entered into an Administrative Order on Consent ("AOC") with the EPA on May 10, 2010, which was subsequently amended in November 2010 and January 2011, to investigate the potential source of TCE contamination and to evaluate options to abate, mitigate or eliminate the release or threat of release of hazardous substances at the Millsboro Site. The Company, along with other parties, continues to conduct the studies and prepare remediation plans in accordance with the amended AOC. While it is not possible at this time to determine with certainty the ultimate outcome of this matter, the Company believes, given the information currently available, that the ultimate resolution of all known claims, after taking into account amounts already accrued, will not have a material adverse effect on its financial condition, results of operations and cash flows.
	Coldwater Creek, Saint Louis County, Missouri. The Company is named as a defendant in 14 tort complaints filed between February 2012 and January 2014 with numerous plaintiffs pending in the U.S. District Court for the Eastern District of Missouri. These cases allege personal injury for alleged exposure to radiological substances present in Coldwater Creek in Missouri. Plaintiffs lived in various locations in Saint Louis County, Missouri near Coldwater Creek. Radiological residues which may have been present in the creek have been remediated by the U.S. Army Corps of Engineers. The Company believes that it has meritorious defenses to these complaints and is vigorously defending against them. The Company is unable to estimate a range of reasonably possible losses for the following reasons: (i) the proceedings are in early stages; (ii) the Company has not received and reviewed complete information regarding the plaintiffs and their medical conditions; and (iii) there are significant factual issues to be resolved. While it is not possible at this time to determine with certainty the ultimate outcome of these cases, the Company believes, given the information currently available, that the ultimate resolution of all known claims will not have a material adverse effect on its financial condition, results of operations and cash flows.
	Lower Passaic River, New Jersey. The Company and approximately 70 other companies comprise the Lower Passaic Cooperating Parties Group ("the CPG") and are parties to a May 2007 AOC with the EPA to perform a RI/FS of the lower seventeen miles of the Lower Passaic River in New Jersey ("the River"). The Company's potential liability stems from former operations at Lodi and Belleville, New Jersey. In June 2007, the EPA released a draft Focused Feasibility Study ("FFS") which addressed various early action remediation alternatives for the River. The EPA has not released the final FFS. As an interim step related to the 2007 AOC, the CPG voluntarily entered into an AOC on June 18, 2012, with the EPA for remediation actions focused solely at mile 10.9 of the River. The Company's estimated costs related to the RI/FS and focused remediation action at mile 10.9, based on an interim allocation, are immaterial and have been accrued.
	At this time, the Company cannot reasonably estimate its liability related to the remediation efforts, excluding the RI/FS and remediation actions at mile 10.9, as the RI/FS is ongoing, the ultimate remedial approach and associated cost has not yet been determined, and the parties that will participate in funding the remediation and their respective allocations are not yet known. While it is not possible at this time to determine with certainty the ultimate outcome of this matter, the Company believes, given the information currently available, that the ultimate resolution will not have a material adverse effect on its financial condition, results of operations and cash flows. However; in the event of adverse determinations related to this matter, it is possible that the ultimate liability resulting from this matter and the impact to the Company's results of operations and cash flows could become material.
	Products Liability Litigation
	Beginning with lawsuits brought in July 1976, the Company is also named as a defendant in personal injury lawsuits based on alleged exposure to asbestos-containing materials. A majority of the cases involve product liability claims based principally on allegations of past distribution of products containing asbestos. A limited number of the cases allege premises liability based on claims that individuals were exposed to asbestos while on the Company's property. Each case typically names dozens of corporate defendants in addition to the Company. The complaints generally seek monetary damages for personal injury or bodily injury resulting from alleged exposure to products containing asbestos. The Company's involvement in asbestos cases has been limited because it did not mine or produce asbestos. Furthermore, in the Company's experience, a large percentage of these claims have never been substantiated and have been dismissed by the courts. The Company has not suffered an adverse verdict in a trial court proceeding related to asbestos claims and intends to continue to defend these lawsuits. When appropriate, the Company settles claims; however, amounts paid to settle and defend all asbestos claims have been immaterial. As of December 27, 2013, there were approximately 11,500 asbestos-related cases pending against the Company.
	The Company estimates pending asbestos claims and claims that were incurred but not reported and related insurance recoveries, which are recorded on a gross basis in the unaudited condensed consolidated balance sheet. The Company's estimate of its liability for pending and future claims is based on claims experience over the past five years and covers claims either currently filed or expected to be filed over the next seven years. The Company believes that it has adequate amounts recorded related to these matters. While it is not possible at this time to determine with certainty the ultimate outcome of these asbestos-related proceedings, the Company believes, given the information currently available, that the ultimate resolution of all known and anticipated future claims, after taking into account amounts already accrued, along with recoveries from insurance, will not have a material adverse effect on its financial condition, results of operations and cash flows.
	Asset Retirement Obligations
	The Company has recorded asset retirement obligations for the estimated future costs primarily associated with legal obligations to decommission facilities within the Global Medical Imaging segment, including the facilities located in Petten, the Netherlands and Maryland Heights, Missouri. Substantially all of these obligations are included in other liabilities on the consolidated and combined balance sheets. The following table provides a summary of the changes in the Company's asset retirement obligations:
	Balance at September 27, 2013	$	50.6
	Additions	—
	Accretion expense	0.8
	Payments	—
	Currency translation	0.3
	Balance at December 27, 2013	$	51.7
	The Company believes, given the information currently available, that any potential payment of such estimated amounts will not have a material adverse effect on its financial condition, results of operations and cash flows.
	Industrial Revenue Bonds
	The Company exchanged title to $27.4 million of its plant assets in return for an equal amount of Industrial Revenue Bonds ("IRB") issued by Saint Louis County. The Company also simultaneously leased such assets back from Saint Louis County under a capital lease expiring December 2025, the terms of which provide it with the right of offset against the IRBs. The lease also provides an option for the Company to repurchase the assets at the end of the lease for nominal consideration. These transactions collectively result in a property tax abatement ten years from the date the property is placed in service. Due to right of offset, the capital lease obligation and IRB asset are recorded net in the unaudited condensed consolidated balance sheets. The Company expects that the right of offset will be applied to payments required under these arrangements.
	Tax Matters
	The income tax returns of the Company and its subsidiaries are periodically examined by various tax authorities. The resolution of these matters is subject to the conditions set forth in the tax matters agreement entered into between the Company and Covidien ("the Tax Matters Agreement"). Covidien has the right to administer, control and settle all U.S. income tax audits for periods prior to the Separation. While it is not possible at this time to determine with certainty the ultimate outcome of these matters, the Company believes, given the information currently available, that established liabilities are reasonable and that the ultimate resolution of these matters will not have a material adverse effect on its financial condition, results of operations and cash flows.
	With respect to certain tax returns filed by predecessor affiliates of the Company and Covidien, the IRS has concluded its field examination for the years 1997 through 2000 and has proposed tax adjustments. Several of the proposed adjustments could also affect both Covidien's and the Company's income tax returns for years after 2000. Certain of the IRS's proposed adjustments have been appealed, and all but one of the matters associated with the proposed tax adjustments have been resolved. The unresolved proposed adjustment asserts that substantially all of the predecessor affiliates' intercompany debt originating during the years 1997 through 2000 should not be treated as debt for U.S. federal income tax purposes, and has disallowed interest deductions related to the intercompany debt and certain tax attribute adjustments recognized on the U.S. income tax returns. This matter is subject to the Company's $200.0 million limitation for periods prior to September 29, 2012, as prescribed in the Tax Matters Agreement. While it is not possible at this time to determine with certainty the ultimate outcome of this matter, the Company believes, given the information available to it today, that it will not have a material adverse effect on its financial condition, results of operations and cash flows.
	Other Matters
	The Company is a defendant in a number of other pending legal proceedings relating to present and former operations, acquisitions and dispositions. Given the information currently available, the Company does not expect the ultimate resolution of these proceedings, either individually or in the aggregate, to have a material adverse effect on its financial condition, results of operations and cash flows.

Derivative_Instruments

Derivative Instruments	3 Months Ended
	Dec. 27, 2013
Summary of Derivative Instruments [Abstract]	'
Derivative Instruments	'
	17	Derivative Instruments
	The Company is exposed to certain risks relating to its business operations. Foreign currency option and forward contracts are used to manage the foreign exchange exposures of operations outside the U.S. Swap contracts on commodities historically have been periodically entered into to manage the price risk associated with forecasted purchases of commodities used in the Company's manufacturing processes. Risks that relate to interest rate exposure are managed by using derivative instruments, such as interest rate lock contracts. Changes in the fair value of the derivative financial instruments are recognized in the Company's earnings unless specific hedge criteria are met.
	Foreign Exchange Exposure
	The Company has foreign exchange exposure on the translation of the financial statements and on transactions denominated in foreign currencies. The Company's policy allows for the use of various forward and option contracts to manage foreign currency exposures on accounts and notes receivable, accounts payable, intercompany loans, intercompany cash pooling arrangements and forecasted transactions that are denominated in certain foreign currencies. Existing contracts did not meet the necessary criteria to qualify for hedge accounting; accordingly, all associated changes in fair value were recognized in earnings.
	The location and amount of the net gain (loss) on foreign exchange forward and option contracts not designated as hedging instruments was recorded as follows:
		Three Months Ended
		December 27,			December 28,
		2013			2012
	Cost of sales	$	(0.2	)	$	(0.9	)
	Selling, general and administrative	—			1.1
	Other (expense) income, net	4.2			—
		$	4		$	0.2
	Foreign currency losses included within net income for the three months ended December 27, 2013 and December 28, 2012 were $5.0 million and $0.5 million, respectively.
	The fair value of foreign exchange forward and option contracts were included in the following captions of our unaudited condensed consolidated balance sheets at the end of each period:
		27-Dec-13			September 27, 2013
	Prepaid expenses and other current assets	$	1.9		$	0.9
	Accrued and other current liabilities	0.3			1.4
	Commodities Exposure
	Prior to the Separation, Covidien entered into gas commodity swap contracts on behalf of the Company, which were accounted for as cash flow hedges. As of December 27, 2013, there were no outstanding gas commodity swap contracts; however, the Company may utilize such contracts in the future to mitigate price risk associated with its forecasted commodity purchases. The amounts of the net losses on these contracts recorded during the three months ended December 28, 2012 were as follows:
	Cost of sales	$	0.1
	Selling, general and administrative	0.3
		$	0.4
	Interest Rate Exposure
	MIFSA entered into three forward interest rate lock contracts in March 2013 and April 2013, each with a $300.0 million notional value and designated as cash flow hedges, against the risk of variability in market interest rates in advance of its anticipated issuance of its ten-year fixed rate senior notes due April 2023. Each interest rate lock contract was considered to be highly effective and the $7.6 million loss resulting from their settlements was recorded in accumulated other comprehensive income. As of December 27, 2013, $7.2 million of this loss remains in accumulated other comprehensive income and will be amortized to interest expense over the remaining term of the ten-year notes.

Financial_Instruments_and_Fair

Financial Instruments and Fair Value Measurements	3 Months Ended
	Dec. 27, 2013
Fair Value Disclosures [Abstract]	'
Financial Instruments and Fair Value Measurements	'
	18	Financial Instruments and Fair Value Measurements
	Fair value is defined as the exit price that would be received from the sale of an asset or paid to transfer a liability, using assumptions that market participants would use in pricing an asset or liability. The fair value guidance establishes a three-level fair value hierarchy, which maximizes the use of observable inputs and minimizes the use of unobservable inputs used in measuring fair value. The levels within the hierarchy are as follows:
	Level 1— observable inputs such as quoted prices in active markets for identical assets or liabilities;
	Level 2— significant other observable inputs that are observable either directly or indirectly; and
	Level 3— significant unobservable inputs in which there is little or no market data, which requires the Company to develop its own assumptions.
	The following tables provide a summary of the significant assets and liabilities that are measured at fair value on a recurring basis at the end of each period:
		December 27,			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
		2013			(Level 1)		(Level 2)		(Level 3)
	Assets:
	Debt and equity securities held in rabbi trusts	$	35.9		$	23.8	$	12.1	$	—
	Foreign exchange forward and option contracts	1.9			1.9		—		—
		$	37.8		$	25.7	$	12.1	$	—
	Liabilities:
	Deferred compensation liabilities	$	15.8		$	—	$	15.8	$	—
	Contingent consideration	6.9			—		—		6.9
	Foreign exchange forward and option contracts	0.3			0.3		—		—
		$	23		$	0.3	$	15.8	$	6.9
		September 27,			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
		2013			(Level 1)		(Level 2)		(Level 3)
	Assets:
	Debt and equity securities held in rabbi trusts	$	35.3		$	22.6	$	12.7	$	—
	Foreign exchange forward and option contracts	0.9			0.9		—		—
		$	36.2		$	23.5	$	12.7	$	—
	Liabilities:
	Deferred compensation liabilities	$	13.5		$	—	$	13.5	$	—
	Contingent consideration	6.9			—		—		6.9
	Foreign exchange forward and option contracts	1.4			1.4		—		—
		$	21.8		$	1.4	$	13.5	$	6.9
	Debt and equity securities held in rabbi trust. Debt securities held in the rabbi trust primarily consist of U.S. government and agency securities and corporate bonds. When quoted prices are available in an active market, the investments are classified as level 1. When quoted market prices for a security are not available in an active market, they are classified as level 2. Equity securities held in the rabbi trust primarily consist of U.S. common stocks, which are valued using quoted market prices reported on nationally recognized securities exchanges.
	Foreign exchange forward and option contracts. Foreign currency option and forward contracts are used to economically manage the foreign exchange exposures of operations outside the U.S. Quoted prices are available in an active market; as such, these derivatives are classified as level 1.
	Deferred compensation liabilities. The Company maintains a non-qualified deferred compensation plan in the U.S., which permits eligible employees of the Company to defer a portion of their compensation. A recordkeeping account is set up for each participant and the participant chooses from a variety of funds for the deemed investment of their accounts. The measurement funds generally correspond to the funds offered in the Company's U.S. tax-qualified defined contribution retirement plan and the account balance fluctuates with the investment returns on those funds.
	Contingent consideration. In October 2012, the Company recorded contingent consideration of $6.9 million upon the acquisition of CNS Therapeutics. This contingent consideration, which could potentially total a maximum of $9.0 million, is primarily based on whether the FDA approves another concentration of Gablofen on or before December 31, 2016. The fair value of the contingent payments was measured based on the probability-weighted present value of the consideration expected to be transferred using a discount rate of 1.0%. There were no changes to the initial estimate of the fair value of the consideration during the three months ended December 27, 2013.
	Balance at September 27, 2013	$	6.9
	Change in fair value	—
	Balance at December 27, 2013	$	6.9
	Financial Instruments Not Measured at Fair Value
	The carrying amounts of cash and cash equivalents, accounts receivable, accounts payable and the majority of other current assets and liabilities approximate fair value because of their short-term nature. The Company classifies cash on hand and deposits in banks, including commercial paper, money market accounts and other investments it may hold from time to time, with an original maturity to the Company of three months or less, as cash and cash equivalents (level 1). The fair value of restricted cash is equivalent to its carrying value of $20.3 million and $24.0 million as of December 27, 2013 and September 27, 2013, respectively (level 1), substantially all of which is included in other assets on the unaudited condensed consolidated balance sheets. The Company's life insurance contracts are carried at cash surrender value, which is based on the present value of future cash flows under the terms of the contracts (level 3). Significant assumptions used in determining the cash surrender value include the amount and timing of future cash flows, interest rates and mortality charges. The fair value of these contracts approximates the carrying value of $68.4 million and $67.7 million at December 27, 2013 and September 27, 2013, respectively. These contracts are included in other assets on the unaudited condensed consolidated balance sheets.
	The carrying value of the Company's loan payable approximates fair value due to its short term nature. Since the quoted market prices for the Company's 8.00% and 9.50% debentures are not available in an active market, they are classified as level 2 for purposes of developing an estimate of fair value. The Company's 3.50% and 4.75% notes are classified as level 1, as quoted prices are available in an active market for these notes. The following table presents the carrying values and estimated fair values of the Company's long-term debt, excluding capital leases, as of the end of each period:
		December 27, 2013					September 27, 2013
		Carrying			Fair		Carrying		Fair
		Value			Value		Value		Value
	Loan payable	$	—		$	—	$	0.1	$	0.1
	3.50% notes due April 2018	299.9			292.6		299.9		293.7
	9.50% debentures due May 2022	10.4			14.1		10.4		14.3
	8.00% debentures due March 2023	8			10		8		10.2
	4.75% notes due April 2023	598.2			551.8		598.2		568.5
	Concentration of Credit and Other Risks
	Financial instruments that potentially subject the Company to concentrations of credit risk primarily consist of accounts receivable. The Company does not require collateral from customers. A portion of the Company's accounts receivable outside the U.S. includes sales to government-owned or supported healthcare systems in several countries, which are subject to payment delays. Payment is dependent upon the financial stability and creditworthiness of those countries' national economies. Deteriorating credit and economic conditions in parts of Western Europe, particularly in Spain and Italy, may continue to increase the average length of time it takes the Company to collect its accounts receivables in certain regions within these countries.
	The Company routinely evaluates all government receivables for potential collection risks associated with the availability of government funding and reimbursement practices. The Company has not incurred any significant losses on government receivables; however, if the financial condition of customers or the countries' healthcare systems continue to deteriorate such that their ability to make payments is uncertain, additional allowances may be required in future periods.
	The Company's accounts receivable, net of allowance for doubtful accounts, in Spain and Italy at the end of each period were as follows:
		December 27,			September 27,
		2013			2013
	Spain	$	11.5		$	9.2
	Italy	12.5			12.6
	Net sales to customers in Spain and Italy totaled $12.3 million and $12.2 million for the three months ended December 27, 2013 and December 28, 2012, respectively.
	The following table shows net sales attributable to distributors that accounted for 10% or more of the Company's total net sales:
		Three Months Ended
		December 27,		December 28,
		2013		2012
	Cardinal Health, Inc.	20	%	22	%
	McKesson Corporation	15	%	15	%
	Amerisource Bergen Corporation	12	%	8	%
	The following table shows accounts receivable attributable to distributors that accounted for 10% or more of the Company's gross accounts receivable at the end of each period:
	December 27,		September 27,
	2013		2013
Cardinal Health, Inc.	25	%	18	%
McKesson Corporation	24	%	22	%
Amerisource Bergen Corporation	14	%	14	%
The following table shows net sales attributable to products that accounted for 10% or more of the Company's total net sales:
	Three Months Ended
	December 27,		December 28,
	2013		2012
Optiray™ (CMDS)	13	%	16	%
Methylphenidate ER (Specialty Generics)	10	%	2	%
Molybdenum-99 ("Mo-99") is a key raw material in the Company's Ultra-Technekow™ DTE technetium generators that are sold by its Global Medical Imaging segment. There are only eight suppliers of this raw material worldwide. The Company has agreements to obtain Mo-99 from three nuclear research reactors and relies predominantly upon two of these reactors for its Mo-99 supply. Accordingly, a disruption in the commercial supply or a significant increase in the cost of this material from these sources could have a material adverse effect on the Company's financial condition, results of operations and cash flows.

Segment_Data

Segment Data	3 Months Ended
	Dec. 27, 2013
Segment Reporting [Abstract]	'
Segment Data	'
	19	Segment Data
	Selected information by business segment was as follows:
		Three Months Ended
		December 27,			December 28,
		2013			2012
	Net sales:
	Specialty Pharmaceuticals	$	309.5		$	260.2
	Global Medical Imaging	218.6			229.7
	Net sales of operating segments (1)	528.1			489.9
	Other (2)	12.1			14.1
	Net sales	$	540.2		$	504
	Operating income:
	Specialty Pharmaceuticals	$	113		$	35
	Global Medical Imaging	4.4			49.1
	Segment operating income	117.4			84.1
	Unallocated amounts:
	Corporate and allocated expenses (3)	(25.2		)	(25.4		)
	Intangible asset amortization	(8.8		)	(8.9		)
	Restructuring and related charges, net (4)	(8.1		)	(1.0		)
	Separation costs	(2.2		)	(12.0		)
	Operating income	$	73.1		$	36.8
	-1	Amounts represent sales to external customers.
	-2	Represents products that were sold to Covidien, our former parent company, which is discussed in Note 14.
	-3	Includes administration expenses and certain compensation, environmental and other costs not charged to the Company's operating segments.
	-4	Includes restructuring-related accelerated depreciation of $0.1 million and $0.8 million for the three months ended December 27, 2013 and December 28, 2012, respectively.

Condensed_Consolidating_Financ

Condensed Consolidating Financial Statements	3 Months Ended
	Dec. 27, 2013
Condensed Consolidating Financial Statements [Abstract]	'
Condensed Consolidating Financial Statements	'
	20	Condensed Consolidating Financial Statements
	In November 2012, MIFSA was formed as a 100% owned subsidiary of Covidien in connection with the Separation. MIFSA is a holding company established to own, directly or indirectly, substantially all of the operating subsidiaries of the Company, to issue debt securities and to perform treasury operations. At the time of the Separation, MIFSA became a 100% owned subsidiary of Mallinckrodt plc.
	MIFSA is the borrower under the Notes and the Credit Facility, all of which are fully and unconditionally guaranteed by Mallinckrodt plc. The following information provides the composition of the Company's comprehensive income, assets, liabilities, equity and cash flows by relevant group within the Company: Mallinckrodt plc as guarantor, MIFSA as issuer of the debt and the operating companies that represent assets of MIFSA. There are no subsidiary guarantees. Unaudited condensed consolidating financial information for Mallinckrodt plc and MIFSA, on a standalone basis, has been presented using the equity method of accounting for subsidiaries.
	Unaudited condensed consolidating financial information for Mallinckrodt plc and MIFSA has only been presented for the three months ended December 27, 2013 and as of December 27, 2013 and September 27, 2013, as no material activity occurred for either entity during the three months ended December 28, 2012. Mallinckrodt plc was not incorporated until January 2013, during the second fiscal quarter of 2013. MIFSA was incorporated in November 2012, during the first fiscal quarter of 2013, through a $45 thousand cash contribution from Covidien; however, MIFSA entered into no other transactions during the three months ended December 28, 2012.
	MALLINCKRODT PLC
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of December 27, 2013
	(unaudited, in millions)
		Mallinckrodt plc			Mallinckrodt International Finance S.A.			Other Subsidiaries			Eliminations			Consolidated
	Assets
	Current Assets:
	Cash and cash equivalents	$	1.1		$	34.9		$	251.8		$	—		$	287.8
	Accounts receivable, net	—			—			396.8			—			396.8
	Inventories	—			—			428.9			—			428.9
	Deferred income taxes	—			—			163.5			—			163.5
	Prepaid expenses and other current assets	0.7			—			131.1			—			131.8
	Intercompany receivable	2.7			—			5.5			(8.2		)	—
	Total current assets	4.5			34.9			1,377.60			(8.2		)	1,408.80
	Property, plant and equipment, net	—			—			997.3			—			997.3
	Goodwill	—			—			532			—			532
	Intangible assets, net	—			—			413.3			—			413.3
	Investment in subsidiaries	1,320.10			2,584.90			—			(3,905.0		)	—
	Intercompany loan receivable	—			3.9			409.5			(413.4		)	—
	Other assets	—			10.8			207.2			—			218
	Total Assets	$	1,324.60		$	2,634.50		$	3,936.90		$	(4,326.6	)	$	3,569.40
	Liabilities and Shareholders' Equity
	Current Liabilities:
	Current maturities of long-term debt	$	—		$	—		$	1.4		$	—		$	1.4
	Accounts payable	5.3			0.1			139.1			—			144.5
	Accrued payroll and payroll-related costs	—			—			32.7			—			32.7
	Accrued branded rebates	—			—			37.5			—			37.5
	Accrued and other current liabilities	0.6			8.2			329.1			—			337.9
	Intercompany payable	5.5			—			2.7			(8.2		)	—
	Total current liabilities	11.4			8.3			542.5			(8.2		)	554
	Long-term debt	—			898.2			19.8			—			918
	Pension and postretirement benefits	—			—			105.9			—			105.9
	Environmental liabilities	—			—			38.7			—			38.7
	Deferred income taxes	—			—			317.3			—			317.3
	Other income tax liabilities	—			—			149.7			—			149.7
	Intercompany loans payable	3.9			409.5			—			(413.4		)	—
	Other liabilities	—			—			176.5			—			176.5
	Total liabilities	15.3			1,316.00			1,350.40			(421.6		)	2,260.10
	Shareholders' equity	1,309.30			1,318.50			2,586.50			(3,905.0		)	1,309.30
	Total Liabilities and Shareholders' Equity	$	1,324.60		$	2,634.50		$	3,936.90		$	(4,326.6	)	$	3,569.40
	MALLINCKRODT PLC
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of September 27, 2013
	(unaudited, in millions)
		Mallinckrodt plc			Mallinckrodt International Finance S.A.			Other Subsidiaries			Eliminations			Consolidated
	Assets
	Current Assets:
	Cash and cash equivalents	$	1.2		$	56.5		$	217.8		$	—		$	275.5
	Accounts receivable, net	—			—			400.8			—			400.8
	Inventories	—			—			403.1			—			403.1
	Deferred income taxes	—			—			171.1			—			171.1
	Prepaid expenses and other current assets	1			—			133.4			—			134.4
	Intercompany receivable	2.7			—			12.2			(14.9		)	—
	Total current assets	4.9			56.5			1,338.40			(14.9		)	1,384.90
	Property, plant and equipment, net	—			—			997.4			—			997.4
	Goodwill	—			—			532			—			532
	Intangible assets, net	—			—			422.1			—			422.1
	Investment in subsidiaries	1,266.10			2,520.40			—			(3,786.5		)	—
	Intercompany loan receivable	—			2.4			409.6			(412.0		)	—
Other assets	—			11.2			209			—			220.2
Total Assets	$	1,271.00		$	2,590.50		$	3,908.50		$	(4,213.4	)	$	3,556.60
Liabilities and Shareholders' Equity
Current Liabilities:
Current maturities of long-term debt	$	—		$	—		$	1.5		$	—		$	1.5
Accounts payable	0.1			—			120.8			—			120.9
Accrued payroll and payroll-related costs	0.1			—			66.4			—			66.5
Accrued branded rebates	—			—			34.6			—			34.6
Accrued and other current liabilities	0.6			18.3			357.8			—			376.7
Intercompany payable	12.2			—			2.7			(14.9		)	—
Total current liabilities	13			18.3			583.8			(14.9		)	600.2
Long-term debt	—			898.1			20.2			—			918.3
Pension and postretirement benefits	—			—			108			—			108
Environmental liabilities	—			—			39.5			—			39.5
Deferred income taxes	—			—			310.1			—			310.1
Other income tax liabilities	—			—			153.1			—			153.1
Intercompany loans payable	2.4			409.6			—			(412.0		)	—
Other liabilities	—			—			171.8			—			171.8
Total liabilities	15.4			1,326.00			1,386.50			(426.9		)	2,301.00
Shareholders' equity	1,255.60			1,264.50			2,522.00			(3,786.5		)	1,255.60
Total Liabilities and Shareholders' Equity	$	1,271.00		$	2,590.50		$	3,908.50		$	(4,213.4	)	$	3,556.60
MALLINCKRODT PLC
CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
For the three months ended December 27, 2013
(unaudited, in millions)
	Mallinckrodt plc			Mallinckrodt International Finance S.A.			Other Subsidiaries			Eliminations			Consolidated
Net sales	$	—		$	—		$	540.2		$	—		$	540.2
Cost of sales	—			—			284.6			—			284.6
Gross profit	—			—			255.6			—			255.6
Selling, general and administrative expenses	4			0.1			142.1			—			146.2
Research and development expenses	—			—			39			—			39
Separation costs	0.8			—			1.4			—			2.2
Restructuring charges, net	—			—			8			—			8
Gains on divestiture and license	—			—			(12.9		)	—			(12.9		)
Operating income	(4.8		)	(0.1		)	78			—			73.1
Interest expense	—			(10.5		)	0.7			—			(9.8		)
Interest income	—			—			0.3			—			0.3
Other income (expense), net	0.7			—			(1.3		)	—			(0.6		)
Intercompany interest and fees	(3.1		)	—			3.1			—			—
Equity in net income of subsidiaries	52.6			63.2			—			(115.8		)	—
Income from continuing operations before income taxes	45.4			52.6			80.8			(115.8		)	63
Income tax (benefit) expense	(0.2		)	—			16.8			—			16.6
Income from continuing operations	45.6			52.6			64			(115.8		)	46.4
Loss from discontinued operations, net of income taxes	—			—			(0.8		)	—			(0.8		)
Net income	45.6			52.6			63.2			(115.8		)	45.6
Other comprehensive income, net of tax	0.2			0.2			0.1			(0.3		)	0.2
Comprehensive income	$	45.8		$	52.8		$	63.3		$	(116.1	)	$	45.8
MALLINCKRODT PLC
CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
For the three months ended December 27, 2013
(unaudited, in millions)
	Mallinckrodt plc			Mallinckrodt International Finance S.A.			Other Subsidiaries			Eliminations			Consolidated
Cash Flows From Operating Activities:
Net cash (used in) provided by operating activities	$	(5.0	)	$	(20.0	)	$	47.1		$	—		$	22.1
Cash Flows From Investing Activities:
Capital expenditures	—			—			(21.7		)	—			(21.7		)
Intercompany loan investment	—			(1.5		)	0.1			1.4			—
Restricted cash	—			—			4.1			—			4.1
Other	—			—			5			—			5
Net cash (used in) investing activities	—			(1.5		)	(12.5		)	1.4			(12.6		)
Cash Flows From Financing Activities:
Repayment of capital leases	—			—			(0.3		)	—			(0.3		)
Excess tax benefit from share-based compensation	—			—			1.3			—			1.3
Proceeds from exercise of share options	4.2			—			—			—			4.2
Purchase of treasury shares	(0.9		)	—			—			—			(0.9		)
Intercompany loan borrowings, net	1.5			(0.1		)	—			(1.4		)	—
Other	0.1			—			(0.2		)	—			(0.1		)
Net cash provided by (used in) financing activities	4.9			(0.1		)	0.8			(1.4		)	4.2
Effect of currency rate changes on cash	—			—			(1.4		)	—			(1.4		)
Net increase in cash and cash equivalents	(0.1		)	(21.6		)	34			—			12.3
Cash and cash equivalents at beginning of period	1.2			56.5			217.8			—			275.5
Cash and cash equivalents at end of period	$	1.1		$	34.9		$	251.8		$	—		$	287.8

Acquisitions_Tables

Acquisitions (Tables)	3 Months Ended
	Dec. 27, 2013
Acquisitions [Abstract]	'
Schedule of Fair Value of Identifiable Assets Acquired and Liabilities Assumed	'
	The following amounts represent the final allocation of the fair value of the identifiable assets acquired and liabilities assumed:
	Current assets (1)	$	13.3
	Intangible assets	91.9
	Goodwill (non-tax deductible) (2)	24.5
	Total assets acquired	129.7
	Current liabilities	4
	Deferred tax liabilities, net (non-current)	27.1
	Contingent consideration (non-current)	6.9
	Total liabilities assumed	38
	Net assets acquired	$	91.7
	-1	This amount includes $3.3 million of accounts receivable, which is also the gross contractual value. As of the acquisition date, the fair value of accounts receivable approximated carrying value.
	-2	Goodwill relates to the Company's ability to exploit CNS Therapeutics' technologies.
Schedule of Reconciliation of Total Consideration	'
	The following reconciles the total consideration to net assets acquired:
	Total consideration	$	95
	Plus: cash assumed in acquisition	3.6
	Less: contingent consideration	(6.9		)
	Net assets acquired	$	91.7
Schedule of Intangible Assets Acquired	'
	Intangible assets acquired consist of the following:
		Amount			Weighted-Average Amortization Period
	Completed technology	$	73.1		13 years
	Trademark	0.2			3 years
	In-process research and development	18.6			Non-Amortizable
		$	91.9

Restructuring_and_Related_Char1

Restructuring and Related Charges (Tables)	3 Months Ended
	Dec. 27, 2013
Restructuring and Related Activities [Abstract]	'
Schedule of Restructuring and Related Charges by Segment	'
	Net restructuring and related charges by segment were as follows:
		Three Months Ended
		December 27,			December 28,
		2013			2012
	Specialty Pharmaceuticals	$	—		$	0.7
	Global Medical Imaging	8.1			0.3
	Restructuring and related charges, net	8.1			1
	Less: accelerated depreciation	(0.1		)	(0.8		)
	Restructuring charges, net	$	8		$	0.2
Schedule of Net Restructuring and Related Charges	'
	Net restructuring and related charges were comprised of the following:
		Three Months Ended
		December 27,			December 28,
		2013			2012
	2013 Mallinckrodt Program	$	8.3		$	—
	Other programs	(0.2		)	1
	Total programs	8.1			1
	Less: non-cash charges, including accelerated depreciation	(0.1		)	(0.9		)
	Total charges expected to be settled in cash	$	8		$	0.1
Schedule of Restructuring Reserves by Type of Cost	'
	The following table summarizes cash activity for restructuring reserves, substantially all of which related to employee severance and benefits:
		2013 Mallinckrodt Program			Other Programs			Total
	Balance at September 27, 2013	$	14.9		$	10.6		$	25.5
	Charges	10.2			0.3			10.5
	Changes in estimate	(2.0		)	(0.5		)	(2.5		)
	Cash payments	(2.2		)	(3.7		)	(5.9		)
	Balance at December 27, 2013	$	20.9		$	6.7		$	27.6
Schedule of Restructuring Charges Incurred Cumulative to Date	'
	Net restructuring and related charges, including associated asset impairments, incurred cumulative to date related to the 2013 Mallinckrodt Program were as follows:
	Specialty Pharmaceuticals	$	2.4
	Global Medical Imaging	17.6
	Corporate	3
		$	23

Earnings_Loss_per_Share_Tables

Earnings (Loss) per Share (Tables)	3 Months Ended
	Dec. 27, 2013
Earnings (Loss) per Share [Abstract]	'
Schedule of Earnings (Loss) per Share	'
		Three months ended
		December 27, 2013	December 28, 2012
	Weighted-average shares for basic earnings (loss) per share	57.8	57.7
	Effect of share options and restricted shares	0.6	—
	Weighted-average shares for diluted earnings (loss) per share	58.4	57.7

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Dec. 27, 2013
Inventory, Net [Abstract]	'
Schedule of Inventories	'
	Inventories were comprised of the following at the end of each period:
		December 27,		September 27,
		2013		2013
	Raw materials and supplies	$	84.6	$	68.8
	Work in process	212.6		191.5
	Finished goods	131.7		142.8
		$	428.9	$	403.1

Property_Plant_and_Equipment_T

Property, Plant and Equipment (Tables)	3 Months Ended
	Dec. 27, 2013
Property, Plant and Equipment [Abstract]	'
Schedule of Property, Plant and Equipment	'
	The gross carrying amount and accumulated depreciation of property, plant and equipment at the end of each period was as follows:
		December 27, 2013			September 27, 2013
	Property, plant and equipment, gross	$	1,896.30		$	1,873.70
	Less: accumulated depreciation	(899.0		)	(876.3		)
	Property, plant and equipment, net	$	997.3		$	997.4

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Dec. 27, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Goodwill	'
	The carrying amount of goodwill by segment for the periods presented was as follows:
		27-Dec-13		27-Sep-13
	Specialty Pharmaceuticals	$	312.3	$	312.3
	Global Medical Imaging	219.7		219.7
		$	532	$	532
Schedule of Intangible Assets	'
	The gross carrying amount and accumulated amortization of intangible assets at the end of each period were as follows:
		27-Dec-13				27-Sep-13
		Gross		Accumulated		Gross		Accumulated
		Carrying		Amortization		Carrying		Amortization
		Amount				Amount
	Amortizable:
	Completed technology	$	449.2	$	202.2	$	449.2	$	196.6
	Licenses	191.1		82.4		191.1		79.3
	Trademarks	7.9		3.9		7.9		3.8
	Total	$	648.2	$	288.5	$	648.2	$	279.7
	Non-Amortizable:
	Trademarks	$	35			$	35
	In-process research and development	18.6				18.6
	Total	$	53.6			$	53.6
Schedule of Future Amortization Expense, Intangible Assets	'
	The estimated aggregate amortization expense on intangible assets owned by the Company is expected to be as follows:
	Remainder of fiscal 2014	$	26.6
	Fiscal 2015	35.4
	Fiscal 2016	35.3
	Fiscal 2017	33.9
	Fiscal 2018	25.2

Debt_Tables

Debt (Tables)	3 Months Ended
	Dec. 27, 2013
Debt Disclosure [Abstract]	'
Schedule of Long-term Debt including Capital Lease Obligation	'
	Debt was comprised of the following at the end of each period:
		27-Dec-13		September 27, 2013
	Current maturities of long-term debt:
	Capital lease obligation	$	1.4	$	1.4
	Loan payable	—		0.1
	Total current debt	1.4		1.5
	Long-term debt:
	3.50% notes due April 2018	299.9		299.9
	9.50% debentures due May 2022	10.4		10.4
	8.00% debentures due March 2023	8		8
	4.75% notes due April 2023	598.2		598.2
	Capital lease obligation	1.5		1.8
	Total long-term debt	918		918.3
	Total debt	$	919.4	$	919.8

Retirement_Plans_Tables

Retirement Plans (Tables) (Pension Benefits)	3 Months Ended
	Dec. 27, 2013
Pension Benefits	'
Defined Benefit Plan Disclosure [Line Items]	'
Schedule of Net Periodic Benefit Cost	'
	The net periodic benefit cost for the Company's defined benefit pension plans was as follows:
		Three Months Ended
		December 27,			December 28,
		2013			2012
	Service cost	$	1.3		$	1.2
	Interest cost	4.9			4.6
	Expected return on plan assets	(6.1		)	(7.4		)
	Amortization of net actuarial loss	2.1			3
	Amortization of prior service (credit) cost	(0.1		)	0.1
	Net periodic benefit cost	$	2.1		$	1.5

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Dec. 27, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]	'
Schedule of Accumulated Other Comprehensive Income	'
	The components of accumulated other comprehensive income were as follows:
		Currency Translation			Unrecognized Gain (Loss) on Derivatives			Unrecognized Gain (Loss) on Benefit Plans			Accumulated Other Comprehensive Income
	Balance at September 27, 2013	$	158.6		$	(7.3	)	$	(42.8	)	$	108.5
	Other comprehensive income before reclassifications	0.4			—			—			0.4
	Amounts reclassified from accumulated other comprehensive income	—			0.1			(0.3		)	(0.2		)
	Net current period other comprehensive income	0.4			0.1			(0.3		)	0.2
	Balance at December 27, 2013	$	159		$	(7.2	)	$	(43.1	)	$	108.7
Schedule of Reclassifications out of Accumulated Other Comprehensive Income	'
	The following summarizes reclassifications out of accumulated other comprehensive income for the three months ended December 27, 2013:
		Amount Reclassified from Accumulated Other Comprehensive Income			Line Item in the Unaudited Condensed Consolidated
					Statement of Income
	Amortization of unrealized gain on derivatives	$	0.2		Interest expense
	Income tax provision	(0.1		)	Provision for income taxes
	Net of income taxes	0.1
	Amortization of pension and post-retirement benefit plans:
	Net actuarial loss	2.1			(1)
	Prior service cost	(2.5		)	(1)
	Total before tax	(0.4		)
	Income tax provision	0.1			Provision for income taxes
	Net of income taxes	(0.3		)
	Total reclassifications for the period	$	(0.2	)
	-1	These accumulated other comprehensive income components are included in the computation of net periodic benefit cost. See Note 12 for additional details.

Commitment_and_Contingencies_T

Commitment and Contingencies (Tables)	3 Months Ended
	Dec. 27, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Changes in Asset Retirement Obligations	'
	The following table provides a summary of the changes in the Company's asset retirement obligations:
	Balance at September 27, 2013	$	50.6
	Additions	—
	Accretion expense	0.8
	Payments	—
	Currency translation	0.3
	Balance at December 27, 2013	$	51.7

Derivative_Instruments_Tables

Derivative Instruments (Tables)	3 Months Ended
	Dec. 27, 2013
Summary of Derivative Instruments [Abstract]	'
Schedule of Net Gain (Loss) on Foreign Exchange Contracts	'
	The location and amount of the net gain (loss) on foreign exchange forward and option contracts not designated as hedging instruments was recorded as follows:
		Three Months Ended
		December 27,			December 28,
		2013			2012
	Cost of sales	$	(0.2	)	$	(0.9	)
	Selling, general and administrative	—			1.1
	Other (expense) income, net	4.2			—
		$	4		$	0.2
Schedule of Fair Value of Foreign Exchange Contracts	'
	The fair value of foreign exchange forward and option contracts were included in the following captions of our unaudited condensed consolidated balance sheets at the end of each period:
		27-Dec-13			September 27, 2013
	Prepaid expenses and other current assets	$	1.9		$	0.9
	Accrued and other current liabilities	0.3			1.4
Schedule of Net Losses on Gas Commodity Swap Contracts	'
	The amounts of the net losses on these contracts recorded during the three months ended December 28, 2012 were as follows:
	Cost of sales	$	0.1
	Selling, general and administrative	0.3
		$	0.4

Financial_Instruments_and_Fair1

Financial Instruments and Fair Value Measurements (Tables)	3 Months Ended
	Dec. 27, 2013
Fair Value Disclosures [Abstract]	'
Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis	'
	The following tables provide a summary of the significant assets and liabilities that are measured at fair value on a recurring basis at the end of each period:
		December 27,			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
		2013			(Level 1)		(Level 2)		(Level 3)
	Assets:
	Debt and equity securities held in rabbi trusts	$	35.9		$	23.8	$	12.1	$	—
	Foreign exchange forward and option contracts	1.9			1.9		—		—
		$	37.8		$	25.7	$	12.1	$	—
	Liabilities:
	Deferred compensation liabilities	$	15.8		$	—	$	15.8	$	—
	Contingent consideration	6.9			—		—		6.9
	Foreign exchange forward and option contracts	0.3			0.3		—		—
		$	23		$	0.3	$	15.8	$	6.9
		September 27,			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
		2013			(Level 1)		(Level 2)		(Level 3)
	Assets:
	Debt and equity securities held in rabbi trusts	$	35.3		$	22.6	$	12.7	$	—
	Foreign exchange forward and option contracts	0.9			0.9		—		—
		$	36.2		$	23.5	$	12.7	$	—
	Liabilities:
	Deferred compensation liabilities	$	13.5		$	—	$	13.5	$	—
	Contingent consideration	6.9			—		—		6.9
	Foreign exchange forward and option contracts	1.4			1.4		—		—
		$	21.8		$	1.4	$	13.5	$	6.9
Schedule of Reconciliation of Changes in Fair Value of Contingent Consideration	'
	Balance at September 27, 2013	$	6.9
	Change in fair value	—
	Balance at December 27, 2013	$	6.9
Schedule of Carrying Amount and Fair Value of Long-term Debt	'
	The following table presents the carrying values and estimated fair values of the Company's long-term debt, excluding capital leases, as of the end of each period:
		December 27, 2013					September 27, 2013
		Carrying			Fair		Carrying		Fair
		Value			Value		Value		Value
	Loan payable	$	—		$	—	$	0.1	$	0.1
	3.50% notes due April 2018	299.9			292.6		299.9		293.7
	9.50% debentures due May 2022	10.4			14.1		10.4		14.3
	8.00% debentures due March 2023	8			10		8		10.2
	4.75% notes due April 2023	598.2			551.8		598.2		568.5
Schedule of Accounts Receivable Concentration Risk	'
	The Company's accounts receivable, net of allowance for doubtful accounts, in Spain and Italy at the end of each period were as follows:
		December 27,			September 27,
		2013			2013
	Spain	$	11.5		$	9.2
	Italy	12.5			12.6
Schedules of Concentration of Risk	'
	The following table shows net sales attributable to distributors that accounted for 10% or more of the Company's total net sales:
		Three Months Ended
		December 27,		December 28,
		2013		2012
	Cardinal Health, Inc.	20	%	22	%
	McKesson Corporation	15	%	15	%
	Amerisource Bergen Corporation	12	%	8	%
	The following table shows accounts receivable attributable to distributors that accounted for 10% or more of the Company's gross accounts receivable at the end of each period:
		December 27,		September 27,
		2013		2013
	Cardinal Health, Inc.	25	%	18	%
	McKesson Corporation	24	%	22	%
	Amerisource Bergen Corporation	14	%	14	%
	The following table shows net sales attributable to products that accounted for 10% or more of the Company's total net sales:
		Three Months Ended
		December 27,		December 28,
		2013		2012
	Optiray™ (CMDS)	13	%	16	%
	Methylphenidate ER (Specialty Generics)	10	%	2	%

Segment_Data_Tables

Segment Data (Tables)	3 Months Ended
	Dec. 27, 2013
Segment Reporting [Abstract]	'
Schedule of Segment Reporting Information by Business Segment	'
	Selected information by business segment was as follows:
		Three Months Ended
		December 27,			December 28,
		2013			2012
	Net sales:
	Specialty Pharmaceuticals	$	309.5		$	260.2
	Global Medical Imaging	218.6			229.7
	Net sales of operating segments (1)	528.1			489.9
	Other (2)	12.1			14.1
	Net sales	$	540.2		$	504
	Operating income:
	Specialty Pharmaceuticals	$	113		$	35
	Global Medical Imaging	4.4			49.1
	Segment operating income	117.4			84.1
	Unallocated amounts:
	Corporate and allocated expenses (3)	(25.2		)	(25.4		)
	Intangible asset amortization	(8.8		)	(8.9		)
	Restructuring and related charges, net (4)	(8.1		)	(1.0		)
	Separation costs	(2.2		)	(12.0		)
	Operating income	$	73.1		$	36.8
	-1	Amounts represent sales to external customers.
	-2	Represents products that were sold to Covidien, our former parent company, which is discussed in Note 14.
	-3	Includes administration expenses and certain compensation, environmental and other costs not charged to the Company's operating segments.
	-4	Includes restructuring-related accelerated depreciation of $0.1 million and $0.8 million for the three months ended December 27, 2013 and December 28, 2012, respectively.

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Statements (Tables)	3 Months Ended
	Dec. 27, 2013
Condensed Consolidating Financial Statements [Abstract]	'
Schedule of Condensed Consolidating Balance Sheets	'
	MALLINCKRODT PLC
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of December 27, 2013
	(unaudited, in millions)
		Mallinckrodt plc			Mallinckrodt International Finance S.A.			Other Subsidiaries			Eliminations			Consolidated
	Assets
	Current Assets:
	Cash and cash equivalents	$	1.1		$	34.9		$	251.8		$	—		$	287.8
	Accounts receivable, net	—			—			396.8			—			396.8
	Inventories	—			—			428.9			—			428.9
	Deferred income taxes	—			—			163.5			—			163.5
	Prepaid expenses and other current assets	0.7			—			131.1			—			131.8
	Intercompany receivable	2.7			—			5.5			(8.2		)	—
	Total current assets	4.5			34.9			1,377.60			(8.2		)	1,408.80
	Property, plant and equipment, net	—			—			997.3			—			997.3
	Goodwill	—			—			532			—			532
	Intangible assets, net	—			—			413.3			—			413.3
	Investment in subsidiaries	1,320.10			2,584.90			—			(3,905.0		)	—
	Intercompany loan receivable	—			3.9			409.5			(413.4		)	—
	Other assets	—			10.8			207.2			—			218
	Total Assets	$	1,324.60		$	2,634.50		$	3,936.90		$	(4,326.6	)	$	3,569.40
	Liabilities and Shareholders' Equity
	Current Liabilities:
	Current maturities of long-term debt	$	—		$	—		$	1.4		$	—		$	1.4
	Accounts payable	5.3			0.1			139.1			—			144.5
	Accrued payroll and payroll-related costs	—			—			32.7			—			32.7
	Accrued branded rebates	—			—			37.5			—			37.5
	Accrued and other current liabilities	0.6			8.2			329.1			—			337.9
	Intercompany payable	5.5			—			2.7			(8.2		)	—
	Total current liabilities	11.4			8.3			542.5			(8.2		)	554
	Long-term debt	—			898.2			19.8			—			918
	Pension and postretirement benefits	—			—			105.9			—			105.9
	Environmental liabilities	—			—			38.7			—			38.7
	Deferred income taxes	—			—			317.3			—			317.3
	Other income tax liabilities	—			—			149.7			—			149.7
	Intercompany loans payable	3.9			409.5			—			(413.4		)	—
	Other liabilities	—			—			176.5			—			176.5
	Total liabilities	15.3			1,316.00			1,350.40			(421.6		)	2,260.10
	Shareholders' equity	1,309.30			1,318.50			2,586.50			(3,905.0		)	1,309.30
	Total Liabilities and Shareholders' Equity	$	1,324.60		$	2,634.50		$	3,936.90		$	(4,326.6	)	$	3,569.40
	MALLINCKRODT PLC
	CONDENSED CONSOLIDATING BALANCE SHEET
	As of September 27, 2013
	(unaudited, in millions)
		Mallinckrodt plc			Mallinckrodt International Finance S.A.			Other Subsidiaries			Eliminations			Consolidated
	Assets
	Current Assets:
	Cash and cash equivalents	$	1.2		$	56.5		$	217.8		$	—		$	275.5
	Accounts receivable, net	—			—			400.8			—			400.8
	Inventories	—			—			403.1			—			403.1
	Deferred income taxes	—			—			171.1			—			171.1
	Prepaid expenses and other current assets	1			—			133.4			—			134.4
	Intercompany receivable	2.7			—			12.2			(14.9		)	—
	Total current assets	4.9			56.5			1,338.40			(14.9		)	1,384.90
	Property, plant and equipment, net	—			—			997.4			—			997.4
	Goodwill	—			—			532			—			532
	Intangible assets, net	—			—			422.1			—			422.1
	Investment in subsidiaries	1,266.10			2,520.40			—			(3,786.5		)	—
	Intercompany loan receivable	—			2.4			409.6			(412.0		)	—
	Other assets	—			11.2			209			—			220.2
	Total Assets	$	1,271.00		$	2,590.50		$	3,908.50		$	(4,213.4	)	$	3,556.60
	Liabilities and Shareholders' Equity
	Current Liabilities:
Current maturities of long-term debt	$	—		$	—		$	1.5		$	—		$	1.5
Accounts payable	0.1			—			120.8			—			120.9
Accrued payroll and payroll-related costs	0.1			—			66.4			—			66.5
Accrued branded rebates	—			—			34.6			—			34.6
Accrued and other current liabilities	0.6			18.3			357.8			—			376.7
Intercompany payable	12.2			—			2.7			(14.9		)	—
Total current liabilities	13			18.3			583.8			(14.9		)	600.2
Long-term debt	—			898.1			20.2			—			918.3
Pension and postretirement benefits	—			—			108			—			108
Environmental liabilities	—			—			39.5			—			39.5
Deferred income taxes	—			—			310.1			—			310.1
Other income tax liabilities	—			—			153.1			—			153.1
Intercompany loans payable	2.4			409.6			—			(412.0		)	—
Other liabilities	—			—			171.8			—			171.8
Total liabilities	15.4			1,326.00			1,386.50			(426.9		)	2,301.00
Shareholders' equity	1,255.60			1,264.50			2,522.00			(3,786.5		)	1,255.60
Total Liabilities and Shareholders' Equity	$	1,271.00		$	2,590.50		$	3,908.50		$	(4,213.4	)	$	3,556.60
Schedule of Condensed Consolidating Statement of Comprehensive Income	'
	MALLINCKRODT PLC
	CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME
	For the three months ended December 27, 2013
	(unaudited, in millions)
		Mallinckrodt plc			Mallinckrodt International Finance S.A.			Other Subsidiaries			Eliminations			Consolidated
	Net sales	$	—		$	—		$	540.2		$	—		$	540.2
	Cost of sales	—			—			284.6			—			284.6
	Gross profit	—			—			255.6			—			255.6
	Selling, general and administrative expenses	4			0.1			142.1			—			146.2
	Research and development expenses	—			—			39			—			39
	Separation costs	0.8			—			1.4			—			2.2
	Restructuring charges, net	—			—			8			—			8
	Gains on divestiture and license	—			—			(12.9		)	—			(12.9		)
	Operating income	(4.8		)	(0.1		)	78			—			73.1
	Interest expense	—			(10.5		)	0.7			—			(9.8		)
	Interest income	—			—			0.3			—			0.3
	Other income (expense), net	0.7			—			(1.3		)	—			(0.6		)
	Intercompany interest and fees	(3.1		)	—			3.1			—			—
	Equity in net income of subsidiaries	52.6			63.2			—			(115.8		)	—
	Income from continuing operations before income taxes	45.4			52.6			80.8			(115.8		)	63
	Income tax (benefit) expense	(0.2		)	—			16.8			—			16.6
	Income from continuing operations	45.6			52.6			64			(115.8		)	46.4
	Loss from discontinued operations, net of income taxes	—			—			(0.8		)	—			(0.8		)
	Net income	45.6			52.6			63.2			(115.8		)	45.6
	Other comprehensive income, net of tax	0.2			0.2			0.1			(0.3		)	0.2
	Comprehensive income	$	45.8		$	52.8		$	63.3		$	(116.1	)	$	45.8
Schedule of Condensed Consolidating Statement of Cash Flows	'
	MALLINCKRODT PLC
	CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS
	For the three months ended December 27, 2013
	(unaudited, in millions)
		Mallinckrodt plc			Mallinckrodt International Finance S.A.			Other Subsidiaries			Eliminations			Consolidated
	Cash Flows From Operating Activities:
	Net cash (used in) provided by operating activities	$	(5.0	)	$	(20.0	)	$	47.1		$	—		$	22.1
	Cash Flows From Investing Activities:
	Capital expenditures	—			—			(21.7		)	—			(21.7		)
	Intercompany loan investment	—			(1.5		)	0.1			1.4			—
	Restricted cash	—			—			4.1			—			4.1
	Other	—			—			5			—			5
	Net cash (used in) investing activities	—			(1.5		)	(12.5		)	1.4			(12.6		)
	Cash Flows From Financing Activities:
	Repayment of capital leases	—			—			(0.3		)	—			(0.3		)
	Excess tax benefit from share-based compensation	—			—			1.3			—			1.3
	Proceeds from exercise of share options	4.2			—			—			—			4.2
	Purchase of treasury shares	(0.9		)	—			—			—			(0.9		)
	Intercompany loan borrowings, net	1.5			(0.1		)	—			(1.4		)	—
	Other	0.1			—			(0.2		)	—			(0.1		)
	Net cash provided by (used in) financing activities	4.9			(0.1		)	0.8			(1.4		)	4.2
	Effect of currency rate changes on cash	—			—			(1.4		)	—			(1.4		)
	Net increase in cash and cash equivalents	(0.1		)	(21.6		)	34			—			12.3
	Cash and cash equivalents at beginning of period	1.2			56.5			217.8			—			275.5
	Cash and cash equivalents at end of period	$	1.1		$	34.9		$	251.8		$	—		$	287.8

Background_and_Basis_of_Presen1

Background and Basis of Presentation (Details) (USD $)	Dec. 27, 2013	Dec. 28, 2012
In Millions, unless otherwise specified	Country	Covidien
		Selling, general and administrative
Schedule of Basis of Presenation [Line Items]	'	'
Number of countries in which entity has a commercial presence	70	'
Allocated expenses	'	$11.90

License_of_Intellectual_Proper1

License of Intellectual Property (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Gains on divestiture and license	$12.90	$0.70
Oxymorphone ER	'	'
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'
Upfront cash received	4	'
Contractually obligated future cash receipts	8	'
Gains on divestiture and license	$11.70	'

Acquisitions_Narrative_Details

Acquisitions (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Oct. 01, 2012	Dec. 27, 2013	Dec. 28, 2012
Business Acquisition [Line Items]	'	'	'
Cash payment, net of cash acquired	'	$0	$88.10
Net sales	'	540.2	504
CNS Therapeutics, Inc.	'	'	'
Business Acquisition [Line Items]	'	'	'
Contingent consideration	6.9	'	'
Contingent consideration, potential maximum	9	'	'
Specialty Pharmaceuticals | CNS Therapeutics, Inc.	'	'	'
Business Acquisition [Line Items]	'	'	'
Total consideration	95	'	'
Cash payment, net of cash acquired	88.1	'	'
Cash assumed in the acquisition	3.6	'	'
Contingent consideration	6.9	'	'
Contingent consideration, potential maximum	9	'	'
Assumptions used calculating in-process research and development, discount rate	35.00%	'	'
Net sales	'	7.6	6.5
In-process Research and Development | Specialty Pharmaceuticals | CNS Therapeutics, Inc.	'	'	'
Business Acquisition [Line Items]	'	'	'
Estimated cost to complete in-process research	$18	'	'

Acquisitions_Schedule_of_Fair_

Acquisitions (Schedule of Fair Value of Identifiable Assets Acquired and Liabilities Assumed) (Details) (USD $)	Dec. 27, 2013	Sep. 27, 2013	Oct. 01, 2012	Dec. 27, 2013	Sep. 27, 2013	Oct. 01, 2012
In Millions, unless otherwise specified			CNS Therapeutics, Inc.	Specialty Pharmaceuticals	Specialty Pharmaceuticals	Specialty Pharmaceuticals
						CNS Therapeutics, Inc.
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]	'	'	'	'	'	'
Current assets	'	'	'	'	'	$13.30	[1]
Intangible assets	'	'	'	'	'	91.9
Goodwill (non-tax deductible)	532	532	'	312.3	312.3	24.5	[2]
Total assets acquired	'	'	'	'	'	129.7
Current liabilities	'	'	'	'	'	4
Deferred tax liabilities, net (non-current)	'	'	'	'	'	27.1
Contingent consideration	'	'	6.9	'	'	6.9
Total liabilities assumed	'	'	'	'	'	38
Net assets acquired	'	'	'	'	'	91.7
Acquired accounts receivable	'	'	'	'	'	$3.30
[1]	This amount includes $3.3 million of accounts receivable, which is also the gross contractual value. As of the acquisition date, the fair value of accounts receivable approximated carrying value.
[2]	Goodwill relates to the Company's ability to exploit CNS Therapeutics' technologies.

Acquisitions_Schedule_of_Recon

Acquisitions (Schedule of Reconciliation of Total Consideration) (Details) (CNS Therapeutics, Inc., USD $)	0 Months Ended
In Millions, unless otherwise specified	Oct. 01, 2012
Business Acquisition [Line Items]	'
Less: contingent consideration	($6.90)
Specialty Pharmaceuticals	'
Business Acquisition [Line Items]	'
Total consideration	95
Plus: cash assumed in the acquisition	3.6
Less: contingent consideration	-6.9
Net assets acquired	$91.70

Acquisitions_Schedule_of_Intan

Acquisitions (Schedule of Intangible Assets Acquired) (Details) (Specialty Pharmaceuticals, CNS Therapeutics, Inc., USD $)	0 Months Ended
In Millions, unless otherwise specified	Oct. 01, 2012
Intangible Assets Acquired as Part of Business Combination [Line Items]	'
Intangible assets	$91.90
In-process Research and Development	'
Intangible Assets Acquired as Part of Business Combination [Line Items]	'
Indefinite-lived intangible assets acquired	18.6
Completed Technology	'
Intangible Assets Acquired as Part of Business Combination [Line Items]	'
Amortizable intangible assets acquired	73.1
Intangible assets acquired, weighted-average useful life	'13 years
Trademarks	'
Intangible Assets Acquired as Part of Business Combination [Line Items]	'
Amortizable intangible assets acquired	$0.20
Intangible assets acquired, weighted-average useful life	'3 years

Restructuring_and_Related_Char2

Restructuring and Related Charges (Narrative) (Details) (2013 Mallinckrodt program, USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013
Minimum	'
Restructuring Cost and Reserve [Line Items]	'
2013 Mallinckrodt program expected cost range	$100
Maximum	'
Restructuring Cost and Reserve [Line Items]	'
2013 Mallinckrodt program expected cost range	$125

Restructuring_and_Related_Char3

Restructuring and Related Charges (Schedule of Restructuring and Related Charges by Segment) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Restructuring Cost and Reserve [Line Items]	'	'
Total restructuring and related charges	$8.10	$1
Less: accelerated depreciation	-0.1	-0.8
Restructuring charges, net	8	0.2
Specialty Pharmaceuticals	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Total restructuring and related charges	0	0.7
Global Medical Imaging	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Total restructuring and related charges	$8.10	$0.30

Restructuring_and_Related_Char4

Restructuring and Related Charges (Schedule of Net Restructuring and Related Charges) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Restructuring Cost and Reserve [Line Items]	'	'
Total restructuring and related charges	$8.10	$1
Less: non-cash charges, including accelerated depreciation	-0.1	-0.9
Total charges expected to be settled in cash	8	0.1
2013 Mallinckrodt program	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Total restructuring and related charges	8.3	0
Other programs	'	'
Restructuring Cost and Reserve [Line Items]	'	'
Total restructuring and related charges	($0.20)	$1

Restructuring_and_Related_Char5

Restructuring and Related Charges (Schedule of Restructuring Reserves by Type of Cost) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013
Restructuring Reserve [Roll Forward]	'
Beginning Balance	$25.50
Charges	10.5
Changes in estimate	-2.5
Cash payments	-5.9
Ending Balance	27.6
2013 Mallinckrodt program	'
Restructuring Reserve [Roll Forward]	'
Beginning Balance	14.9
Charges	10.2
Changes in estimate	-2
Cash payments	-2.2
Ending Balance	20.9
Other programs	'
Restructuring Reserve [Roll Forward]	'
Beginning Balance	10.6
Charges	0.3
Changes in estimate	-0.5
Cash payments	-3.7
Ending Balance	$6.70

Restructuring_and_Related_Char6

Restructuring and Related Charges (Schedule of Restructuring Charges Incurred Cumulative to Date) (Details) (2013 Mallinckrodt program, USD $)	15 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013
Restructuring Cost and Reserve [Line Items]	'
Restructuring costs incurred cumulative to date	$23
Specialty Pharmaceuticals	'
Restructuring Cost and Reserve [Line Items]	'
Restructuring costs incurred cumulative to date	2.4
Global Medical Imaging	'
Restructuring Cost and Reserve [Line Items]	'
Restructuring costs incurred cumulative to date	17.6
Corporate	'
Restructuring Cost and Reserve [Line Items]	'
Restructuring costs incurred cumulative to date	$3

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012	Sep. 27, 2013
Income Taxes [Line Items]	'	'	'
Provision for income taxes	$16.60	$17.10	'
Income from continuing operations before income taxes	63	36.9	'
Effective tax rate	26.30%	46.30%	'
Separation costs	2.2	12	'
Unrecognized tax benefits	100.7	'	100.1
Unrecognized tax benefits, net increase	0.6	'	'
Unrecognized tax benefits, additions related to prior period tax positions	4.3	'	'
Unrecognized tax benefits, additions related to current year tax positions	0.5	'	'
Unrecognized tax benefits, lapse of statute of limitations	4.2	'	'
Unrecognized tax benefits, which if favorably settled would benefit the effective tax rate	96.9	'	'
Interest accrued on unrecognized tax benefits	58.3	'	62.1
Unrecognized tax benefits that would impact effective tax rate, upper bound of change	11.1	'	'
Income tax penalties and interest accrued that would impact effective tax rate, upper bound of change	12.5	'	'
Separation Costs	'	'	'
Income Taxes [Line Items]	'	'	'
Tax benefit on separation costs	$0.70	$0.30	'

Earnings_Loss_per_Share_Detail

Earnings (Loss) per Share (Details)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Earnings (Loss) per Share [Abstract]	'	'
Distribution ratio	0.125	'
Weighted-average shares for basic earnings (loss) per share (in shares)	57.8	57.7
Effect of share options and restricted shares (in shares)	0.6	0
Weighted-average shares for diluted earnings (loss) per share (in shares)	58.4	57.7
Antidilutive securities excluded from weighted-average shares (in shares)	0.1	'

Inventories_Details

Inventories (Details) (USD $)	Dec. 27, 2013	Sep. 27, 2013
In Millions, unless otherwise specified
Inventory, Net [Abstract]	'	'
Raw materials and supplies	$84.60	$68.80
Work in process	212.6	191.5
Finished goods	131.7	142.8
Inventories	$428.90	$403.10

Property_Plant_and_Equipment_S

Property, Plant and Equipment (Schedule of Property, Plant and Equipment) (Details) (USD $)	Dec. 27, 2013	Sep. 27, 2013
In Millions, unless otherwise specified
Property, Plant and Equipment [Abstract]	'	'
Property, plant and equipment, gross	$1,896.30	$1,873.70
Less: accumulated depreciation	-899	-876.3
Property, plant and equipment, net	$997.30	$997.40

Property_Plant_and_Equipment_N

Property, Plant and Equipment (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Property, Plant and Equipment [Line Items]	'	'
Depreciation	$26.30	$24.80
Demonstration Equipment	'	'
Property, Plant and Equipment [Line Items]	'	'
Depreciation	$1.10	$0.80

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets (Schedule Of Goodwill) (Details) (USD $)	Dec. 27, 2013	Sep. 27, 2013
In Millions, unless otherwise specified
Goodwill [Line Items]	'	'
Goodwill	$532	$532
Specialty Pharmaceuticals	'	'
Goodwill [Line Items]	'	'
Goodwill	312.3	312.3
Global Medical Imaging	'	'
Goodwill [Line Items]	'	'
Goodwill	$219.70	$219.70

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012	Sep. 27, 2013
Schedule of Intangible Asset by Major Class [Line Items]	'	'	'
Finite-lived intangible assets, gross	$648.20	'	$648.20
Accumulated amortization	288.5	'	279.7
Indefinitie-lived intangible assets, gross	53.6	'	53.6
Intangible asset amortization	8.8	8.9	'
Trademarks	'	'	'
Schedule of Intangible Asset by Major Class [Line Items]	'	'	'
Indefinitie-lived intangible assets, gross	35	'	35
In-process Research and Development	'	'	'
Schedule of Intangible Asset by Major Class [Line Items]	'	'	'
Indefinitie-lived intangible assets, gross	18.6	'	18.6
Completed Technology	'	'	'
Schedule of Intangible Asset by Major Class [Line Items]	'	'	'
Finite-lived intangible assets, gross	449.2	'	449.2
Accumulated amortization	202.2	'	196.6
Licensing Agreements	'	'	'
Schedule of Intangible Asset by Major Class [Line Items]	'	'	'
Finite-lived intangible assets, gross	191.1	'	191.1
Accumulated amortization	82.4	'	79.3
Trademarks	'	'	'
Schedule of Intangible Asset by Major Class [Line Items]	'	'	'
Finite-lived intangible assets, gross	7.9	'	7.9
Accumulated amortization	$3.90	'	$3.80

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets (Schedule of Future Amortization Expense, Intangible Assets) (Details) (USD $)	Dec. 27, 2013
In Millions, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'
Remainder of fiscal 2014	$26.60
Fiscal 2015	35.4
Fiscal 2016	35.3
Fiscal 2017	33.9
Fiscal 2018	$25.20

Debt_Schedule_of_Long_term_deb

Debt (Schedule of Long term debt and Capital lease obligation) (Details) (USD $)	Dec. 27, 2013	Sep. 27, 2013
In Millions, unless otherwise specified
Current maturities of long-term debt:	'	'
Capital lease obligation	$1.40	$1.40
Total current debt	1.4	1.5
Long-term debt:	'	'
Capital lease obligation	1.5	1.8
Long-term debt	918	918.3
Total debt	919.4	919.8
Senior Notes | 3.50% Senior Note	'	'
Long-term debt:	'	'
Long term debt, excluding current maturities	299.9	299.9
Senior Notes | 4.75% Senior Note	'	'
Long-term debt:	'	'
Long term debt, excluding current maturities	598.2	598.2
Debentures | 9.50% Debenture	'	'
Long-term debt:	'	'
Long term debt, excluding current maturities	10.4	10.4
Debentures | 8.00% Debenture	'	'
Long-term debt:	'	'
Long term debt, excluding current maturities	8	8
Loans Payable	'	'
Current maturities of long-term debt:	'	'
Loan payable	$0	$0.10

Debt_Narrative_Details

Debt (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended				3 Months Ended
	Mar. 31, 2013	Dec. 27, 2013	Dec. 27, 2013	Apr. 30, 2013	Apr. 30, 2013	Dec. 27, 2013	Mar. 31, 2013
	Line of Credt	Line of Credt	Senior Notes	Senior Notes	Senior Notes	Line of Credt	Letter of Credit
				3.50% Senior Note	4.75% Senior Note	LIBOR	Line of Credt
Debt Instrument [Line Items]	'	'	'	'	'	'	'
Maximum borrowing capacity	$250,000,000	'	'	'	'	'	$150,000,000
Term of debt instrument	'5 years	'	'10 years	'	'	'	'
Variable interest rate	'	'	'	'	'	1.50%	'
Facility fees for letters of credit	'	0.25%	'	'	'	'	'
Letters of credit outstanding	'	0	'	'	'	'	'
Borrowings, outstanding	'	0	'	'	'	'	'
Face amount	'	'	'	$300,000,000	$600,000,000	'	'
Stated interest rate	'	'	'	3.50%	4.75%	'	'

Retirement_Plans_Schedule_of_N

Retirement Plans (Schedule of Net Periodic Benefit Cost) (Details) (Pension Benefits, USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Pension Benefits	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Service cost	$1.30	$1.20
Interest cost	4.9	4.6
Expected return on plan assets	-6.1	-7.4
Amortization of net actuarial loss	2.1	3
Amortization of prior service (credit) cost	-0.1	0.1
Net periodic benefit cost	$2.10	$1.50

Retirement_Plans_Narrative_Det

Retirement Plans (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Postretirement Benefits	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'
Net periodic benefit credit	$1.80	$1.60
Covidien	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'	'
Company contributions to pension plans	'	$37.50

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]	'
Beginning balance	$108.50
Other comprehensive income before reclassifications	0.4
Amounts reclassified from accumulated other comprehensive income	-0.2
Net current period other comprehensive income	0.2
Ending balance	108.7
Currency Translation	'
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]	'
Beginning balance	158.6
Other comprehensive income before reclassifications	0.4
Amounts reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income	0.4
Ending balance	159
Unrecognized Gain (Loss) on Derivatives	'
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]	'
Beginning balance	-7.3
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive income	0.1
Net current period other comprehensive income	0.1
Ending balance	-7.2
Unrecognized Gain (Loss) on Benefit Plans	'
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]	'
Beginning balance	-42.8
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive income	-0.3
Net current period other comprehensive income	-0.3
Ending balance	($43.10)

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive Income (Schedule of Reclassifications out of Accumulated Other Comprehensive Income) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'
Total reclassifications for the period	($0.20)
Reclassification out of Accumulated Other Comprehensive Income	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'
Amortization of unrealized gain on derivatives, tax	-0.1
Amortization of unrealized gain on derivatives, net of tax	0.1
Amortization of pension and post-retirement plans, net actuarial loss	2.1	[1]
Amortization of pension and post-retirement plans, prior service cost	-2.5	[1]
Amortization of pension and post-retirement plans, before tax	-0.4
Amortization of pension and post-retirement plans, tax	0.1
Amortization of pension and post-retirement plans, net of tax	-0.3
Total reclassifications for the period	-0.2
Reclassification out of Accumulated Other Comprehensive Income | Interest Expense	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'
Amortization of unrealized gain on derivatives	$0.20
[1]	These accumulated other comprehensive income components are included in the computation of net periodic benefit cost. See Note 12 for additional details.

Transactions_with_Former_Paren1

Transactions with Former Parent Company (Details) (Covidien, USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012	Dec. 27, 2013	Dec. 28, 2012	Dec. 28, 2012	Dec. 27, 2013	Sep. 27, 2013	Dec. 27, 2013	Sep. 27, 2013
	Net sales	Net sales	Cost of sales	Cost of sales	Selling, general and administrative	Prepaid expenses and other current assets	Prepaid expenses and other current assets	Accrued and other liabilities	Accrued and other liabilities
Related Party Transaction [Line Items]	'	'	'	'	'	'	'	'	'
Inventory sold	$12.10	$14.10	'	'	'	'	'	'	'
Inventory purchases	'	'	10	12.9	'	'	'	'	'
Allocated expenses	'	'	'	'	11.9	'	'	'	'
Due from related parties	'	'	'	'	'	66.2	62.2	'	'
Due to related parties	'	'	'	'	'	'	'	$72.70	$79.30

Guarantees_Details

Guarantees (Details) (USD $)	Dec. 27, 2013	Dec. 27, 2013	Dec. 27, 2013	Dec. 27, 2013	Dec. 27, 2013	Sep. 27, 2013	Dec. 27, 2013	Sep. 27, 2013	Dec. 27, 2013	Sep. 27, 2013
In Millions, unless otherwise specified	Others	Maryland Heights, Missouri	Saint Louis, Missouri	Mallinckrodt Baker	Mallinckrodt Baker	Mallinckrodt Baker	Mallinckrodt Baker	Mallinckrodt Baker	Mallinckrodt Baker	Mallinckrodt Baker
		Surety Bond	Letter of Credit	Indemnification Agreement	Indemnification Agreement	Indemnification Agreement	Indemnification Agreement	Indemnification Agreement	Environmental, Health and Safety Matters	Environmental, Health and Safety Matters
					Other Liabilities	Other Liabilities	Other Assets	Other Assets	Indemnification Agreement	Indemnification Agreement
									Other Liabilities	Other Liabilities
Guarantor Obligations [Line Items]	'	'	'	'	'	'	'	'	'	'
Guarantor obligations, obligation term	'	'	'	'17 years	'	'	'	'	'	'
Guarantors obligation	'	'	'	'	$16.80	$20.10	'	'	$13.90	$17.20
Maximum future payments	32.7	58	21.1	71.4	'	'	'	'	'	'
Escrow	'	'	'	$30	'	'	$19.40	$23.50	'	'

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013
	Defendent
Loss Contingencies [Line Items]	'
Remedial cost range, minimum	44.5
Remedial cost range, maximum	80.3
Environmental liabilities	44.5
Lower Passaic River, New Jersey	'
Loss Contingencies [Line Items]	'
Companies comprising the Lower Passaic Cooperating Parties Group (in defendants)	70
Asbestos Matters	'
Loss Contingencies [Line Items]	'
Asbestos related pending cases	11,500
Estimation of liability, historical term	'5 years
Estimation of liability, expected future term of claims	'7 years
Accrued and other current liabilities	'
Loss Contingencies [Line Items]	'
Environmental liabilities, current	5.8
Coldwater Creek, St. Louis County, Missouri	'
Loss Contingencies [Line Items]	'
Number of cases	14
Tax Matters Agreement | Covidien	'
Loss Contingencies [Line Items]	'
Tax agreement, tax threshold	200
Industrial Revenue Bonds	'
Loss Contingencies [Line Items]	'
Plant assets exchanged for IRBs	27.4

Commitments_and_Contingencies_1

Commitments and Contingencies (Schedule of Asset Retirement Obligations) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'
Beginning balance	$50.60
Additions	0
Accretion expense	0.8
Payments	0
Currency translation	0.3
Ending balance	$51.70

Derivative_Instruments_Schedul

Derivative Instruments (Schedule of Net Gain (Loss) on Foreign Exchange Contracts) (Details) (Not Designated as Hedging Instrument, Foreign Exchange Forward and Option, USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Derivative Instruments, (Loss) Gain [Line Items]	'	'
Net gain (loss) on foreign exchange forward and option contracts not designated as hedging instruments	$4	$0.20
Cost of sales	'	'
Derivative Instruments, (Loss) Gain [Line Items]	'	'
Net gain (loss) on foreign exchange forward and option contracts not designated as hedging instruments	-0.2	-0.9
Selling, general and administrative	'	'
Derivative Instruments, (Loss) Gain [Line Items]	'	'
Net gain (loss) on foreign exchange forward and option contracts not designated as hedging instruments	0	1.1
Other (expense) income, net	'	'
Derivative Instruments, (Loss) Gain [Line Items]	'	'
Net gain (loss) on foreign exchange forward and option contracts not designated as hedging instruments	$4.20	$0

Derivative_Instruments_Schedul1

Derivative Instruments (Schedule of Fair Value of Foreign Exchange Contracts) (Details) (Foreign Exchange Forward and Option, Not Designated as Hedging Instrument, USD $)	Dec. 27, 2013	Sep. 27, 2013
In Millions, unless otherwise specified
Prepaid expenses and other current assets	'	'
Derivatives, Fair Value [Line Items]	'	'
Foreign exchange forward and option contracts, asset	$1.90	$0.90
Accrued and other current liabilities	'	'
Derivatives, Fair Value [Line Items]	'	'
Foreign exchange forward and option contracts, liability	$0.30	$1.40

Derivative_Instruments_Schedul2

Derivative Instruments (Schedule of Net Losses on Gas Commodity Swap Contracts) (Details) (Cash Flow Hedges, Designated as Hedging Instrument, Gas Commodity Swap Contract, USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 28, 2012
Derivative Instruments, Gain (Loss) [Line Items]	'
Net loss on commodity swap contracts	($0.40)
Cost of sales	'
Derivative Instruments, Gain (Loss) [Line Items]	'
Net loss on commodity swap contracts	-0.1
Selling, general and administrative	'
Derivative Instruments, Gain (Loss) [Line Items]	'
Net loss on commodity swap contracts	($0.30)

Derivative_Instruments_Narrati

Derivative Instruments (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012	Dec. 27, 2013	Dec. 27, 2013	Mar. 31, 2013
			Senior Notes	Designated as Hedging Instrument	Designated as Hedging Instrument
				Forward Interest Rate Lock Contract	Forward Interest Rate Lock Contract
				Cash Flow Hedges	Cash Flow Hedges
					contract
Derivative Instruments, Gain (Loss) [Line Items]	'	'	'	'	'
Foreign currency loss	$5	$0.50	'	'	'
Forward interest rate lock contracts, number	'	'	'	'	3
Forward interest rate lock contracts, notional amount	'	'	'	'	300
Term of debt instrument	'	'	'10 years	'	'
Losses resulting from terminated derivatives, recorded in AOCI	'	'	'	7.6	'
Loss included within AOCI related to terminated interest rate lock contracts	'	'	'	$7.20	'

Financial_Instruments_and_Fair2

Financial Instruments and Fair Value Measurements (Narrative) (Details) (USD $)

3 Months Ended

In Millions, unless otherwise specified

Dec. 27, 2013

Dec. 28, 2012

Dec. 27, 2013

Dec. 28, 2012

Dec. 27, 2013

Oct. 01, 2012

Dec. 27, 2013

Dec. 27, 2013

Apr. 30, 2013

Dec. 27, 2013

Apr. 30, 2013

Dec. 27, 2013

Dec. 27, 2013

Sep. 27, 2013

Dec. 27, 2013

Sep. 27, 2013

Spain and Italy

Spain and Italy

CNS Therapeutics, Inc.

CNS Therapeutics, Inc.

Debentures

Debentures

Senior Notes

Senior Notes

Senior Notes

Senior Notes

Other Assets

Other Assets

Other Assets

Other Assets

8.00% Debenture

9.50% Debenture

3.50% Senior Note

3.50% Senior Note

4.75% Senior Note

4.75% Senior Note

Carrying Value

Carrying Value

Carrying Value

Carrying Value

Level 2

Level 2

Level 1

Level 1

Level 1

Level 1

Level 3

Level 3

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value of contingent consideration upon acquisition

'

'

'

'

'

$6.90

'

'

'

'

'

'

'

'

'

'

Maximum contingent payments for acquisition

'

'

'

'

'

9

'

'

'

'

'

'

'

'

'

'

Discount rate

'

'

'

'

1.00%

'

'

'

'

'

'

'

'

'

'

'

Restricted cash

'

'

'

'

'

'

'

'

'

'

'

'

20.3

24

'

'

Cash surrender value of life insurance

'

'

'

'

'

'

'

'

'

'

'

'

'

'

68.4

67.7

Stated interest rate

'

'

'

'

'

'

8.00%

9.50%

3.50%

3.50%

4.75%

4.75%

'

'

'

'

Net sales

$540.20

$504

$12.30

$12.20

'

'

'

'

'

'

'

'

'

'

'

'

Financial_Instruments_and_Fair3

Financial Instruments and Fair Value Measurements (Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) (Recurring, USD $)	Dec. 27, 2013	Sep. 27, 2013
In Millions, unless otherwise specified
Total	'	'
Assets:	'	'
Debt and equity securities held in rabbi trusts	$35.90	$35.30
Foreign exchange forward and option contracts	1.9	0.9
Total assets at fair value	37.8	36.2
Liabilities:	'	'
Deferred compensation liabilities	15.8	13.5
Contingent consideration	6.9	6.9
Foreign exchange forward and option contracts	0.3	1.4
Total liabilities at fair value	23	21.8
Quoted Prices in Active Markets for Identical Assets (Level 1)	'	'
Assets:	'	'
Debt and equity securities held in rabbi trusts	23.8	22.6
Foreign exchange forward and option contracts	1.9	0.9
Total assets at fair value	25.7	23.5
Liabilities:	'	'
Deferred compensation liabilities	0	0
Contingent consideration	0	0
Foreign exchange forward and option contracts	0.3	1.4
Total liabilities at fair value	0.3	1.4
Significant Other Observable Inputs (Level 2)	'	'
Assets:	'	'
Debt and equity securities held in rabbi trusts	12.1	12.7
Foreign exchange forward and option contracts	0	0
Total assets at fair value	12.1	12.7
Liabilities:	'	'
Deferred compensation liabilities	15.8	13.5
Contingent consideration	0	0
Foreign exchange forward and option contracts	0	0
Total liabilities at fair value	15.8	13.5
Significant Unobservable Inputs (Level 3)	'	'
Assets:	'	'
Debt and equity securities held in rabbi trusts	0	0
Foreign exchange forward and option contracts	0	0
Total assets at fair value	0	0
Liabilities:	'	'
Deferred compensation liabilities	0	0
Contingent consideration	6.9	6.9
Foreign exchange forward and option contracts	0	0
Total liabilities at fair value	$6.90	$6.90

Financial_Instruments_and_Fair4

Financial Instruments and Fair Value Measurements (Schedule of Reconciliation of Changes in Fair Value of Contingent Consideration) (Details) (Recurring, Contingent Consideration, CNS Therapeutics, Inc., USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013
Recurring | Contingent Consideration | CNS Therapeutics, Inc.	'
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'
Beginning balance	$6.90
Change in fair value	0
Ending balance	$6.90

Financial_Instruments_and_Fair5

Financial Instruments and Fair Value Measurements (Schedule of Carrying Amount and Fair Value of Long-term Debt) (Details) (USD $)	Dec. 27, 2013	Sep. 27, 2013
In Millions, unless otherwise specified
Carrying Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans payable	$0	$0.10
Carrying Value | Senior Notes | 3.50% Senior Note	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long term debt	299.9	299.9
Carrying Value | Senior Notes | 4.75% Senior Note	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long term debt	598.2	598.2
Carrying Value | Debentures | 9.50% Debenture	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long term debt	10.4	10.4
Carrying Value | Debentures | 8.00% Debenture	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long term debt	8	8
Fair Value	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Loans payable	0	0.1
Fair Value | Senior Notes | 3.50% Senior Note	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long term debt	292.6	293.7
Fair Value | Senior Notes | 4.75% Senior Note	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long term debt	551.8	568.5
Fair Value | Debentures | 9.50% Debenture	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long term debt	14.1	14.3
Fair Value | Debentures | 8.00% Debenture	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long term debt	$10	$10.20

Financial_Instruments_and_Fair6

Financial Instruments and Fair Value Measurements (Schedule of Accounts Receivable Concentration Risk) (Details) (USD $)	Dec. 27, 2013	Sep. 27, 2013
In Millions, unless otherwise specified
Spain	'	'
Segment Reporting Information [Line Items]	'	'
Accounts receivable	$11.50	$9.20
Italy	'	'
Segment Reporting Information [Line Items]	'	'
Accounts receivable	$12.50	$12.60

Financial_Instruments_and_Fair7

Financial Instruments and Fair Value Measurements (Schedules of Concentration of Risk) (Details)

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

Dec. 27, 2013

Dec. 28, 2012

Dec. 27, 2013

Dec. 28, 2012

Dec. 27, 2013

Dec. 28, 2012

Dec. 27, 2013

Sep. 27, 2013

Dec. 27, 2013

Sep. 27, 2013

Dec. 27, 2013

Sep. 27, 2013

Dec. 27, 2013

Dec. 28, 2012

Dec. 27, 2013

Dec. 28, 2012

Distributor Concentration Risk

Distributor Concentration Risk

Distributor Concentration Risk

Distributor Concentration Risk

Distributor Concentration Risk

Distributor Concentration Risk

Distributor Concentration Risk

Distributor Concentration Risk

Distributor Concentration Risk

Distributor Concentration Risk

Distributor Concentration Risk

Distributor Concentration Risk

Product Concentration Risk

Product Concentration Risk

Product Concentration Risk

Product Concentration Risk

Net Sales Attributable to Distributors

Net Sales Attributable to Distributors

Net Sales Attributable to Distributors

Net Sales Attributable to Distributors

Net Sales Attributable to Distributors

Net Sales Attributable to Distributors

Accounts Receivable Attributable to Distributors

Accounts Receivable Attributable to Distributors

Accounts Receivable Attributable to Distributors

Accounts Receivable Attributable to Distributors

Accounts Receivable Attributable to Distributors

Accounts Receivable Attributable to Distributors

Net Sales Attributable to Products

Net Sales Attributable to Products

Net Sales Attributable to Products

Net Sales Attributable to Products

Cardinal Health, Inc.

Cardinal Health, Inc.

McKesson Corporation

McKesson Corporation

Amerisource Bergen Corporation

Amerisource Bergen Corporation

Cardinal Health, Inc.

Cardinal Health, Inc.

McKesson Corporation

McKesson Corporation

Amerisource Bergen Corporation

Amerisource Bergen Corporation

Optiray (CMDS)

Optiray (CMDS)

Methylphenidate ER (Specialty Generics)

Methylphenidate ER (Specialty Generics)

Concentration Risk [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Concentration risk, percentage

20.00%

22.00%

15.00%

15.00%

12.00%

8.00%

25.00%

18.00%

24.00%

22.00%

14.00%

14.00%

13.00%

16.00%

10.00%

2.00%

Segment_Data_Schedule_of_Segme

Segment Data (Schedule of Segment Reporting Information by Business Segment) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013		Dec. 28, 2012
Net sales	$540.20		$504
Operating income	73.1		36.8
Intangible asset amortization	-8.8		-8.9
Restructuring and related charges, net	-8.1		-1
Separation costs	-2.2		-12
Restructuring related accelerated depreciation	-0.1		-0.8
Specialty Pharmaceuticals	'		'
Restructuring and related charges, net	0		-0.7
Global Medical Imaging	'		'
Restructuring and related charges, net	-8.1		-0.3
Operating Segments	'		'
Net sales	528.1	[1]	489.9	[1]
Operating income	117.4		84.1
Operating Segments | Specialty Pharmaceuticals	'		'
Net sales	309.5		260.2
Operating income	113		35
Operating Segments | Global Medical Imaging	'		'
Net sales	218.6		229.7
Operating income	4.4		49.1
Corporate, Non-Segment	'		'
Net sales	12.1	[2]	14.1	[2]
Corporate and allocated expenses	-25.2	[3]	-25.4	[3]
Intangible asset amortization	-8.8		-8.9
Restructuring and related charges, net	-8.1	[4]	-1	[4]
Separation costs	($2.20)		($12)
[1]	Amounts represent sales to external customers.
[2]	Represents products that were sold to Covidien, our former parent company, which is discussed in Note 14.
[3]	Includes administration expenses and certain compensation, environmental and other costs not charged to the Company's operating segments.
[4]	Includes restructuring-related accelerated depreciation of $0.1 million and $0.8 million for the three months ended DecemberB 27, 2013 and DecemberB 28, 2012, respectively

Condensed_Consolidating_Financ2

Condensed Consolidating Financial Statements (Narrative) (Details) (USD $)	Dec. 27, 2013	Nov. 30, 2012	Nov. 30, 2012
In Thousands, unless otherwise specified	Mallinckrodt International Finance S.A.	Covidien	Covidien
			Mallinckrodt International Finance S.A.
Condensed Consolidating Financial Statements	'	'	'
Percentage of ownership in MIFSA	100.00%	100.00%	'
MIFSA cash contribution from Covidien	'	'	$45

Condensed_Consolidating_Financ3

Condensed Consolidating Financial Statements (Schedule of Condensed Consolidating Balance Sheets) (Details) (USD $)	Dec. 27, 2013	Sep. 27, 2013	Dec. 28, 2012	Sep. 28, 2012
In Millions, unless otherwise specified
Current Assets:	'	'	'	'
Cash and cash equivalents	$287.80	$275.50	$0	$0
Accounts receivable, net	396.8	400.8	'	'
Inventories	428.9	403.1	'	'
Deferred income taxes	163.5	171.1	'	'
Prepaid expenses and other current assets	131.8	134.4	'	'
Intercompany receivable	0	0	'	'
Total current assets	1,408.80	1,384.90	'	'
Property, plant and equipment, net	997.3	997.4	'	'
Goodwill	532	532	'	'
Intangible assets, net	413.3	422.1	'	'
Investment in subsidiaries	0	0	'	'
Intercompany loan receivable	0	0	'	'
Other assets	218	220.2	'	'
Total Assets	3,569.40	3,556.60	'	'
Current Liabilities:	'	'	'	'
Current maturities of long-term debt	1.4	1.5	'	'
Accounts payable	144.5	120.9	'	'
Accrued payroll and payroll-related costs	32.7	66.5	'	'
Accrued branded rebates	37.5	34.6	'	'
Accrued and other current liabilities	337.9	376.7	'	'
Intercompany payable	0	0	'	'
Total current liabilities	554	600.2	'	'
Long-term debt	918	918.3	'	'
Pension and postretirement benefits	105.9	108	'	'
Environmental liabilities	38.7	39.5	'	'
Deferred income taxes	317.3	310.1	'	'
Other income tax liabilities	149.7	153.1	'	'
Intercompany loans payable	0	0	'	'
Other liabilities	176.5	171.8	'	'
Total liabilities	2,260.10	2,301	'	'
Shareholders' equity	1,309.30	1,255.60	'	'
Total Liabilities and Shareholders' Equity	3,569.40	3,556.60	'	'
Mallinckrodt plc	'	'	'	'
Current Assets:	'	'	'	'
Cash and cash equivalents	1.1	1.2	'	'
Accounts receivable, net	0	0	'	'
Inventories	0	0	'	'
Deferred income taxes	0	0	'	'
Prepaid expenses and other current assets	0.7	1	'	'
Intercompany receivable	2.7	2.7	'	'
Total current assets	4.5	4.9	'	'
Property, plant and equipment, net	0	0	'	'
Goodwill	0	0	'	'
Intangible assets, net	0	0	'	'
Investment in subsidiaries	1,320.10	1,266.10	'	'
Intercompany loan receivable	0	0	'	'
Other assets	0	0	'	'
Total Assets	1,324.60	1,271	'	'
Current Liabilities:	'	'	'	'
Current maturities of long-term debt	0	0	'	'
Accounts payable	5.3	0.1	'	'
Accrued payroll and payroll-related costs	0	0.1	'	'
Accrued branded rebates	0	0	'	'
Accrued and other current liabilities	0.6	0.6	'	'
Intercompany payable	5.5	12.2	'	'
Total current liabilities	11.4	13	'	'
Long-term debt	0	0	'	'
Pension and postretirement benefits	0	0	'	'
Environmental liabilities	0	0	'	'
Deferred income taxes	0	0	'	'
Other income tax liabilities	0	0	'	'
Intercompany loans payable	3.9	2.4	'	'
Other liabilities	0	0	'	'
Total liabilities	15.3	15.4	'	'
Shareholders' equity	1,309.30	1,255.60	'	'
Total Liabilities and Shareholders' Equity	1,324.60	1,271	'	'
Mallinckrodt International Finance S.A.	'	'	'	'
Current Assets:	'	'	'	'
Cash and cash equivalents	34.9	56.5	'	'
Accounts receivable, net	0	0	'	'
Inventories	0	0	'	'
Deferred income taxes	0	0	'	'
Prepaid expenses and other current assets	0	0	'	'
Intercompany receivable	0	0	'	'
Total current assets	34.9	56.5	'	'
Property, plant and equipment, net	0	0	'	'
Goodwill	0	0	'	'
Intangible assets, net	0	0	'	'
Investment in subsidiaries	2,584.90	2,520.40	'	'
Intercompany loan receivable	3.9	2.4	'	'
Other assets	10.8	11.2	'	'
Total Assets	2,634.50	2,590.50	'	'
Current Liabilities:	'	'	'	'
Current maturities of long-term debt	0	0	'	'
Accounts payable	0.1	0	'	'
Accrued payroll and payroll-related costs	0	0	'	'
Accrued branded rebates	0	0	'	'
Accrued and other current liabilities	8.2	18.3	'	'
Intercompany payable	0	0	'	'
Total current liabilities	8.3	18.3	'	'
Long-term debt	898.2	898.1	'	'
Pension and postretirement benefits	0	0	'	'
Environmental liabilities	0	0	'	'
Deferred income taxes	0	0	'	'
Other income tax liabilities	0	0	'	'
Intercompany loans payable	409.5	409.6	'	'
Other liabilities	0	0	'	'
Total liabilities	1,316	1,326	'	'
Shareholders' equity	1,318.50	1,264.50	'	'
Total Liabilities and Shareholders' Equity	2,634.50	2,590.50	'	'
Other Subsidiaries	'	'	'	'
Current Assets:	'	'	'	'
Cash and cash equivalents	251.8	217.8	'	'
Accounts receivable, net	396.8	400.8	'	'
Inventories	428.9	403.1	'	'
Deferred income taxes	163.5	171.1	'	'
Prepaid expenses and other current assets	131.1	133.4	'	'
Intercompany receivable	5.5	12.2	'	'
Total current assets	1,377.60	1,338.40	'	'
Property, plant and equipment, net	997.3	997.4	'	'
Goodwill	532	532	'	'
Intangible assets, net	413.3	422.1	'	'
Investment in subsidiaries	0	0	'	'
Intercompany loan receivable	409.5	409.6	'	'
Other assets	207.2	209	'	'
Total Assets	3,936.90	3,908.50	'	'
Current Liabilities:	'	'	'	'
Current maturities of long-term debt	1.4	1.5	'	'
Accounts payable	139.1	120.8	'	'
Accrued payroll and payroll-related costs	32.7	66.4	'	'
Accrued branded rebates	37.5	34.6	'	'
Accrued and other current liabilities	329.1	357.8	'	'
Intercompany payable	2.7	2.7	'	'
Total current liabilities	542.5	583.8	'	'
Long-term debt	19.8	20.2	'	'
Pension and postretirement benefits	105.9	108	'	'
Environmental liabilities	38.7	39.5	'	'
Deferred income taxes	317.3	310.1	'	'
Other income tax liabilities	149.7	153.1	'	'
Intercompany loans payable	0	0	'	'
Other liabilities	176.5	171.8	'	'
Total liabilities	1,350.40	1,386.50	'	'
Shareholders' equity	2,586.50	2,522	'	'
Total Liabilities and Shareholders' Equity	3,936.90	3,908.50	'	'
Eliminations	'	'	'	'
Current Assets:	'	'	'	'
Cash and cash equivalents	0	0	'	'
Accounts receivable, net	0	0	'	'
Inventories	0	0	'	'
Deferred income taxes	0	0	'	'
Prepaid expenses and other current assets	0	0	'	'
Intercompany receivable	-8.2	-14.9	'	'
Total current assets	-8.2	-14.9	'	'
Property, plant and equipment, net	0	0	'	'
Goodwill	0	0	'	'
Intangible assets, net	0	0	'	'
Investment in subsidiaries	-3,905	-3,786.50	'	'
Intercompany loan receivable	-413.4	-412	'	'
Other assets	0	0	'	'
Total Assets	-4,326.60	-4,213.40	'	'
Current Liabilities:	'	'	'	'
Current maturities of long-term debt	0	0	'	'
Accounts payable	0	0	'	'
Accrued payroll and payroll-related costs	0	0	'	'
Accrued branded rebates	0	0	'	'
Accrued and other current liabilities	0	0	'	'
Intercompany payable	-8.2	-14.9	'	'
Total current liabilities	-8.2	-14.9	'	'
Long-term debt	0	0	'	'
Pension and postretirement benefits	0	0	'	'
Environmental liabilities	0	0	'	'
Deferred income taxes	0	0	'	'
Other income tax liabilities	0	0	'	'
Intercompany loans payable	-413.4	-412	'	'
Other liabilities	0	0	'	'
Total liabilities	-421.6	-426.9	'	'
Shareholders' equity	-3,905	-3,786.50	'	'
Total Liabilities and Shareholders' Equity	($4,326.60)	($4,213.40)	'	'

Condensed_Consolidating_Financ4

Condensed Consolidating Financial Statements (Schedule of Condensed Consolidating Statement of Comprehensive Income) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Condensed Consolidating Financial Statements	'	'
Net sales	$540.20	$504
Cost of sales	284.6	270.5
Gross profit	255.6	233.5
Selling, general and administrative expenses	146.2	146.8
Research and development expenses	39	38.4
Separation costs	2.2	12
Restructuring charges, net	8	0.2
Gains on divestiture and license	-12.9	-0.7
Operating income	73.1	36.8
Interest expense	-9.8	-0.1
Interest income	0.3	0
Other income (expense), net	-0.6	0.2
Intercompany interest and fees	0	'
Equity in net income of subsidiaries	0	'
Income from continuing operations before income taxes	63	36.9
Income tax (benefit) expense	16.6	17.1
Income from continuing operations	46.4	19.8
Loss from discontinued operations, net of income taxes	-0.8	-0.6
Net income	45.6	19.2
Other comprehensive income, net of tax	0.2	0.6
Comprehensive income	45.8	19.8
Mallinckrodt plc	'	'
Condensed Consolidating Financial Statements	'	'
Net sales	0	'
Cost of sales	0	'
Gross profit	0	'
Selling, general and administrative expenses	4	'
Research and development expenses	0	'
Separation costs	0.8	'
Restructuring charges, net	0	'
Gains on divestiture and license	0	'
Operating income	-4.8	'
Interest expense	0	'
Interest income	0	'
Other income (expense), net	0.7	'
Intercompany interest and fees	-3.1	'
Equity in net income of subsidiaries	52.6	'
Income from continuing operations before income taxes	45.4	'
Income tax (benefit) expense	-0.2	'
Income from continuing operations	45.6	'
Loss from discontinued operations, net of income taxes	0	'
Net income	45.6	'
Other comprehensive income, net of tax	0.2	'
Comprehensive income	45.8	'
Mallinckrodt International Finance S.A.	'	'
Condensed Consolidating Financial Statements	'	'
Net sales	0	'
Cost of sales	0	'
Gross profit	0	'
Selling, general and administrative expenses	0.1	'
Research and development expenses	0	'
Separation costs	0	'
Restructuring charges, net	0	'
Gains on divestiture and license	0	'
Operating income	-0.1	'
Interest expense	-10.5	'
Interest income	0	'
Other income (expense), net	0	'
Intercompany interest and fees	0	'
Equity in net income of subsidiaries	63.2	'
Income from continuing operations before income taxes	52.6	'
Income tax (benefit) expense	0	'
Income from continuing operations	52.6	'
Loss from discontinued operations, net of income taxes	0	'
Net income	52.6	'
Other comprehensive income, net of tax	0.2	'
Comprehensive income	52.8	'
Other Subsidiaries	'	'
Condensed Consolidating Financial Statements	'	'
Net sales	540.2	'
Cost of sales	284.6	'
Gross profit	255.6	'
Selling, general and administrative expenses	142.1	'
Research and development expenses	39	'
Separation costs	1.4	'
Restructuring charges, net	8	'
Gains on divestiture and license	-12.9	'
Operating income	78	'
Interest expense	0.7	'
Interest income	0.3	'
Other income (expense), net	-1.3	'
Intercompany interest and fees	3.1	'
Equity in net income of subsidiaries	0	'
Income from continuing operations before income taxes	80.8	'
Income tax (benefit) expense	16.8	'
Income from continuing operations	64	'
Loss from discontinued operations, net of income taxes	-0.8	'
Net income	63.2	'
Other comprehensive income, net of tax	0.1	'
Comprehensive income	63.3	'
Eliminations	'	'
Condensed Consolidating Financial Statements	'	'
Net sales	0	'
Cost of sales	0	'
Gross profit	0	'
Selling, general and administrative expenses	0	'
Research and development expenses	0	'
Separation costs	0	'
Restructuring charges, net	0	'
Gains on divestiture and license	0	'
Operating income	0	'
Interest expense	0	'
Interest income	0	'
Other income (expense), net	0	'
Intercompany interest and fees	0	'
Equity in net income of subsidiaries	-115.8	'
Income from continuing operations before income taxes	-115.8	'
Income tax (benefit) expense	0	'
Income from continuing operations	-115.8	'
Loss from discontinued operations, net of income taxes	0	'
Net income	-115.8	'
Other comprehensive income, net of tax	-0.3	'
Comprehensive income	($116.10)	'

Condensed_Consolidating_Financ5

Condensed Consolidating Financial Statements (Schedule of Condensed Consolidating Statement of Cash Flows) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Dec. 27, 2013	Dec. 28, 2012
Cash Flows From Operating Activities:	'	'
Net cash (used in) provided by operating activities	$22.10	($59)
Cash Flows From Investing Activities:	'	'
Capital expenditures	-21.7	-42.8
Intercompany loan investment	0	'
Restricted cash	4.1	0.5
Other	5	0.2
Net cash (used in) investing activities	-12.6	-130.2
Cash Flows From Financing Activities:	'	'
Repayment of capital leases	-0.3	-0.3
Excess tax benefit from share-based compensation	1.3	1.9
Proceeds from exercise of share options	4.2	0
Purchase of treasury shares	-0.9	0
Intercompany loan borrowings, net	0	'
Other	-0.1	0
Net cash provided by (used in) financing activities	4.2	189.2
Effect of currency rate changes on cash	-1.4	0
Net increase in cash and cash equivalents	12.3	0
Cash and cash equivalents at beginning of period	275.5	0
Cash and cash equivalents at end of period	287.8	0
Mallinckrodt plc	'	'
Cash Flows From Operating Activities:	'	'
Net cash (used in) provided by operating activities	-5	'
Cash Flows From Investing Activities:	'	'
Capital expenditures	0	'
Intercompany loan investment	0	'
Restricted cash	0	'
Other	0	'
Net cash (used in) investing activities	0	'
Cash Flows From Financing Activities:	'	'
Repayment of capital leases	0	'
Excess tax benefit from share-based compensation	0	'
Proceeds from exercise of share options	4.2	'
Purchase of treasury shares	-0.9	'
Intercompany loan borrowings, net	1.5	'
Other	0.1	'
Net cash provided by (used in) financing activities	4.9	'
Effect of currency rate changes on cash	0	'
Net increase in cash and cash equivalents	-0.1	'
Cash and cash equivalents at beginning of period	1.2	'
Cash and cash equivalents at end of period	1.1	'
Mallinckrodt International Finance S.A.	'	'
Cash Flows From Operating Activities:	'	'
Net cash (used in) provided by operating activities	-20	'
Cash Flows From Investing Activities:	'	'
Capital expenditures	0	'
Intercompany loan investment	-1.5	'
Restricted cash	0	'
Other	0	'
Net cash (used in) investing activities	-1.5	'
Cash Flows From Financing Activities:	'	'
Repayment of capital leases	0	'
Excess tax benefit from share-based compensation	0	'
Proceeds from exercise of share options	0	'
Purchase of treasury shares	0	'
Intercompany loan borrowings, net	-0.1	'
Other	0	'
Net cash provided by (used in) financing activities	-0.1	'
Effect of currency rate changes on cash	0	'
Net increase in cash and cash equivalents	-21.6	'
Cash and cash equivalents at beginning of period	56.5	'
Cash and cash equivalents at end of period	34.9	'
Other Subsidiaries	'	'
Cash Flows From Operating Activities:	'	'
Net cash (used in) provided by operating activities	47.1	'
Cash Flows From Investing Activities:	'	'
Capital expenditures	-21.7	'
Intercompany loan investment	0.1	'
Restricted cash	4.1	'
Other	5	'
Net cash (used in) investing activities	-12.5	'
Cash Flows From Financing Activities:	'	'
Repayment of capital leases	-0.3	'
Excess tax benefit from share-based compensation	1.3	'
Proceeds from exercise of share options	0	'
Purchase of treasury shares	0	'
Intercompany loan borrowings, net	0	'
Other	-0.2	'
Net cash provided by (used in) financing activities	0.8	'
Effect of currency rate changes on cash	-1.4	'
Net increase in cash and cash equivalents	34	'
Cash and cash equivalents at beginning of period	217.8	'
Cash and cash equivalents at end of period	251.8	'
Eliminations	'	'
Cash Flows From Operating Activities:	'	'
Net cash (used in) provided by operating activities	0	'
Cash Flows From Investing Activities:	'	'
Capital expenditures	0	'
Intercompany loan investment	1.4	'
Restricted cash	0	'
Other	0	'
Net cash (used in) investing activities	1.4	'
Cash Flows From Financing Activities:	'	'
Repayment of capital leases	0	'
Excess tax benefit from share-based compensation	0	'
Proceeds from exercise of share options	0	'
Purchase of treasury shares	0	'
Intercompany loan borrowings, net	-1.4	'
Other	0	'
Net cash provided by (used in) financing activities	-1.4	'
Effect of currency rate changes on cash	0	'
Net increase in cash and cash equivalents	0	'
Cash and cash equivalents at beginning of period	0	'
Cash and cash equivalents at end of period	$0	'