Condensed Consolidating Financial Statements (Schedule of Condensed Consolidating Statements of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 26, 2015	Jun. 27, 2014	Jun. 26, 2015	Jun. 27, 2014
Condensed Consolidating Financial Statements
Net sales	$ 965.1	$ 653.1	$ 2,741.3	$ 1,751.1
Cost of sales	431.6	368.8	1,280.6	948.6
Gross profit	533.5	284.3	1,460.7	802.5
Selling, general and administrative expenses	(332.7)	(221.3)	(938.7)	(561.6)
Research and development expenses	(45.0)	(42.7)	(134.4)	(123.1)
Separation costs	0.0	1.8	0.0	6.6
Restructuring charges, net	(23.1)	(23.8)	(34.0)	(53.5)
Gains on divestiture and license	(0.9)	(0.9)	(2.6)	(14.7)
Operating (loss) income	133.6	(4.4)	356.2	72.4
Interest expense	(72.5)	(22.7)	(178.7)	(44.9)
Interest income	(0.2)	(0.3)	(0.7)	(1.1)
Other income (expense), net	0.5	(0.1)	(7.7)	0.9
Intercompany interest and fees	0.0	0.0	0.0	0.0
Equity in net income of subsidiaries	0.0	0.0	0.0	0.0
Income from continuing operations before income taxes	60.8	(26.7)	185.9	27.7
Income tax benefit	(3.3)	2.4	40.2	6.1
Income from continuing operations	57.5	(24.3)	226.1	33.8
Income (loss) from discontinued operations, net of income taxes	0.5	0.2	23.4	(0.7)
Net income	58.0	(24.1)	249.5	33.1
Other comprehensive loss, net of tax	9.8	4.1	(48.0)	2.0
Comprehensive income	67.8	(20.0)	201.5	35.1
Mallinckrodt plc
Condensed Consolidating Financial Statements
Net sales	0.0	0.0	0.0	0.0
Cost of sales	0.0	0.0	0.0	0.0
Gross profit	0.0	0.0	0.0	0.0
Selling, general and administrative expenses	(29.5)	(7.0)	(91.9)	(18.9)
Research and development expenses	0.0	0.0	0.0	0.0
Separation costs		0.5		1.9
Restructuring charges, net	(1.5)	(0.2)	(9.2)	(0.2)
Gains on divestiture and license	0.0	0.0	0.0	0.0
Operating (loss) income	(31.0)	(7.7)	(101.1)	(21.0)
Interest expense	(20.9)	0.0	(20.9)	0.0
Interest income	0.0	0.0	0.0	0.0
Other income (expense), net	(46.3)	(6.1)	(188.7)	(29.1)
Intercompany interest and fees	3.9	2.9	8.9	6.9
Equity in net income of subsidiaries	(61.4)	19.6	(185.6)	(31.9)
Income from continuing operations before income taxes	51.9	(24.1)	243.4	33.1
Income tax benefit	6.1	0.0	6.1	0.0
Income from continuing operations	58.0	(24.1)	249.5	33.1
Income (loss) from discontinued operations, net of income taxes	0.0	0.0	0.0	0.0
Net income	58.0	(24.1)	249.5	33.1
Other comprehensive loss, net of tax	9.8	4.1	(48.0)	2.0
Comprehensive income	67.8	(20.0)	201.5	35.1
Mallinckrodt International Finance S.A.
Condensed Consolidating Financial Statements
Net sales	0.0	0.0	0.0	0.0
Cost of sales	0.0	0.0	0.0	0.0
Gross profit	0.0	0.0	0.0	0.0
Selling, general and administrative expenses	(9.1)	(0.2)	(9.3)	(0.4)
Research and development expenses	0.0	0.0	0.0	0.0
Separation costs		0.0		0.0
Restructuring charges, net	0.0	0.0	0.0	0.0
Gains on divestiture and license	0.0	0.0	0.0	0.0
Operating (loss) income	(9.1)	(0.2)	(9.3)	(0.4)
Interest expense	(64.4)	(24.2)	(162.1)	(47.5)
Interest income	0.0	0.0	0.0	0.0
Other income (expense), net	0.0	0.0	0.0	0.0
Intercompany interest and fees	0.0	0.0	0.0	0.0
Equity in net income of subsidiaries	(120.1)	(4.8)	(342.2)	(79.7)
Income from continuing operations before income taxes	46.6	(19.6)	170.8	31.8
Income tax benefit	0.0	0.0	0.0	0.1
Income from continuing operations	46.6	(19.6)	170.8	31.9
Income (loss) from discontinued operations, net of income taxes	0.0	0.0	0.0	0.0
Net income	46.6	(19.6)	170.8	31.9
Other comprehensive loss, net of tax	9.8	4.1	(48.0)	2.0
Comprehensive income	56.4	(15.5)	122.8	33.9
Other Subsidiaries
Condensed Consolidating Financial Statements
Net sales	965.1	653.1	2,741.3	1,751.1
Cost of sales	431.6	368.8	1,280.6	948.6
Gross profit	533.5	284.3	1,460.7	802.5
Selling, general and administrative expenses	(294.1)	(214.1)	(837.5)	(542.3)
Research and development expenses	(45.0)	(42.7)	(134.4)	(123.1)
Separation costs		1.3		4.7
Restructuring charges, net	(21.6)	(23.6)	(24.8)	(53.3)
Gains on divestiture and license	(0.9)	(0.9)	(2.6)	(14.7)
Operating (loss) income	173.7	3.5	466.6	93.8
Interest expense	(8.1)	1.5	(16.6)	2.6
Interest income	(21.1)	(0.3)	(21.6)	(1.1)
Other income (expense), net	46.8	6.0	181.0	30.0
Intercompany interest and fees	(3.9)	(2.9)	(8.9)	(6.9)
Equity in net income of subsidiaries	(46.6)	0.0	(170.8)	0.0
Income from continuing operations before income taxes	190.4	2.2	470.3	74.4
Income tax benefit	(9.4)	2.4	34.1	6.0
Income from continuing operations	181.0	4.6	504.4	80.4
Income (loss) from discontinued operations, net of income taxes	0.5	0.2	23.4	(0.7)
Net income	181.5	4.8	527.8	79.7
Other comprehensive loss, net of tax	19.4	3.9	(96.4)	1.6
Comprehensive income	200.9	8.7	431.4	81.3
Eliminations
Condensed Consolidating Financial Statements
Net sales	0.0	0.0	0.0	0.0
Cost of sales	0.0	0.0	0.0	0.0
Gross profit	0.0	0.0	0.0	0.0
Selling, general and administrative expenses	0.0	0.0	0.0	0.0
Research and development expenses	0.0	0.0	0.0	0.0
Separation costs		0.0		0.0
Restructuring charges, net	0.0	0.0	0.0	0.0
Gains on divestiture and license	0.0	0.0	0.0	0.0
Operating (loss) income	0.0	0.0	0.0	0.0
Interest expense	20.9	0.0	20.9	0.0
Interest income	20.9	0.0	20.9	0.0
Other income (expense), net	0.0	0.0	0.0	0.0
Intercompany interest and fees	0.0	0.0	0.0	0.0
Equity in net income of subsidiaries	228.1	(14.8)	698.6	111.6
Income from continuing operations before income taxes	(228.1)	14.8	(698.6)	(111.6)
Income tax benefit	0.0	0.0	0.0	0.0
Income from continuing operations	(228.1)	14.8	(698.6)	(111.6)
Income (loss) from discontinued operations, net of income taxes	0.0	0.0	0.0	0.0
Net income	(228.1)	14.8	(698.6)	(111.6)
Other comprehensive loss, net of tax	(29.2)	(8.0)	144.4	(3.6)
Comprehensive income	$ (257.3)	$ 6.8	$ (554.2)	$ (115.2)