Condensed Consolidating and Combining Financial Statements (Schedule of Condensed Consolidating Balance Sheets) (Details) (USD $) In Millions, unless otherwise specified	Jun. 27, 2014	Sep. 27, 2013	Jun. 28, 2013	Sep. 28, 2012
Current Assets:
Cash and cash equivalents	$ 327.9	$ 275.5	$ 180.4	$ 0
Accounts receivable, net	437.8	400.8
Inventories	398.3	403.1
Deferred income taxes	357.7	171.1
Prepaid expenses and other current assets	128.6	134.4
Intercompany receivable	0	0
Total current assets	1,650.3	1,384.9
Property, plant and equipment, net	1,000.0	997.4
Goodwill	854.2	532.0
Intangible assets, net	1,663.4	422.1
Investment in subsidiaries	0	0
Intercompany loan receivable	0	0
Other assets	255.5	220.2
Total Assets	5,423.4	3,556.6
Current Liabilities:
Current maturities of long-term debt	14.4	1.5
Accounts payable	125.3	120.9
Accrued payroll and payroll-related costs	76.4	66.5
Accrued branded rebates	21.6	34.6
Accrued and other current liabilities	400.9	376.7
Intercompany payable	0	0
Total current liabilities	638.6	600.2
Long-term debt	2,201.3	918.3
Pension and postretirement benefits	97.7	108.0
Environmental liabilities	60.9	39.5
Deferred income taxes	772.6	310.1
Other income tax liabilities	123.7	153.1
Intercompany loans payable	0	0
Other liabilities	200.2	171.8
Total liabilities	4,095.0	2,301.0
Shareholders' equity	1,328.4	1,255.6
Total Liabilities and Shareholders' Equity	5,423.4	3,556.6
Mallinckrodt plc
Current Assets:
Cash and cash equivalents	0.4	1.2	0	0
Accounts receivable, net	0	0
Inventories	0	0
Deferred income taxes	0	0
Prepaid expenses and other current assets	0.5	1.0
Intercompany receivable	5.3	2.7
Total current assets	6.2	4.9
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets, net	0	0
Investment in subsidiaries	1,305.1	1,266.1
Intercompany loan receivable	26.3	0
Other assets	0	0
Total Assets	1,337.6	1,271.0
Current Liabilities:
Current maturities of long-term debt	0	0
Accounts payable	0.4	0.1
Accrued payroll and payroll-related costs	0.1	0.1
Accrued branded rebates	0	0
Accrued and other current liabilities	0.6	0.6
Intercompany payable	8.1	12.2
Total current liabilities	9.2	13.0
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	0	2.4
Other liabilities	0	0
Total liabilities	9.2	15.4
Shareholders' equity	1,328.4	1,255.6
Total Liabilities and Shareholders' Equity	1,337.6	1,271.0
Mallinckrodt International Finance S.A.
Current Assets:
Cash and cash equivalents	125.1	56.5	50.4	0
Accounts receivable, net	0	0
Inventories	0	0
Deferred income taxes	0	0
Prepaid expenses and other current assets	0.2	0
Intercompany receivable	0	0
Total current assets	125.3	56.5
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets, net	0	0
Investment in subsidiaries	4,530.9	2,520.4
Intercompany loan receivable	0	2.4
Other assets	40.3	11.2
Total Assets	4,696.5	2,590.5
Current Liabilities:
Current maturities of long-term debt	13.0	0
Accounts payable	0.1	0
Accrued payroll and payroll-related costs	0	0
Accrued branded rebates	0	0
Accrued and other current liabilities	21.3	18.3
Intercompany payable	2.0	0
Total current liabilities	36.4	18.3
Long-term debt	2,182.2	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	1,174.4	409.6
Other liabilities	0	0
Total liabilities	3,393.0	1,326.0
Shareholders' equity	1,303.5	1,264.5
Total Liabilities and Shareholders' Equity	4,696.5	2,590.5
Other Subsidiaries
Current Assets:
Cash and cash equivalents	202.4	217.8	130.0	0
Accounts receivable, net	437.8	400.8
Inventories	398.3	403.1
Deferred income taxes	357.7	171.1
Prepaid expenses and other current assets	127.9	133.4
Intercompany receivable	10.1	12.2
Total current assets	1,534.2	1,338.4
Property, plant and equipment, net	1,000.0	997.4
Goodwill	854.2	532.0
Intangible assets, net	1,663.4	422.1
Investment in subsidiaries	0	0
Intercompany loan receivable	1,148.1	409.6
Other assets	215.2	209.0
Total Assets	6,415.1	3,908.5
Current Liabilities:
Current maturities of long-term debt	1.4	1.5
Accounts payable	124.8	120.8
Accrued payroll and payroll-related costs	76.3	66.4
Accrued branded rebates	21.6	34.6
Accrued and other current liabilities	379.0	357.8
Intercompany payable	5.3	2.7
Total current liabilities	608.4	583.8
Long-term debt	19.1	20.2
Pension and postretirement benefits	97.7	108.0
Environmental liabilities	60.9	39.5
Deferred income taxes	772.6	310.1
Other income tax liabilities	123.7	153.1
Intercompany loans payable	0	0
Other liabilities	200.2	171.8
Total liabilities	1,882.6	1,386.5
Shareholders' equity	4,532.5	2,522.0
Total Liabilities and Shareholders' Equity	6,415.1	3,908.5
Eliminations
Current Assets:
Cash and cash equivalents	0	0	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	(15.4)	(14.9)
Total current assets	(15.4)	(14.9)
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets, net	0	0
Investment in subsidiaries	(5,836.0)	(3,786.5)
Intercompany loan receivable	(1,174.4)	(412.0)
Other assets	0	0
Total Assets	(7,025.8)	(4,213.4)
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	(15.4)	(14.9)
Total current liabilities	(15.4)	(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	(1,174.4)	(412.0)
Other liabilities	0	0
Total liabilities	(1,189.8)	(426.9)
Shareholders' equity	(5,836.0)	(3,786.5)
Total Liabilities and Shareholders' Equity	$ (7,025.8)	$ (4,213.4)