Guarantor Financial Statements - CONDENSED CONSOLIDATING STATEMENT OF OPERATIONS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 24, 2016	Jun. 26, 2015	Jun. 24, 2016	Jun. 26, 2015
Condensed Financial Statements, Captions [Line Items]
Net revenue	$ 2,449	$ 2,489	$ 7,156	$ 7,397
Cost of product sales	1,026	1,025	2,956	3,046
Cost of services	508	548	1,550	1,645
Selling, general and administrative expenses	667	625	1,842	1,925
Merger costs	7	0	33	0
Restructuring and asset impairment charges, net	5	38	21	108
Operating (loss) income	236	253	754	673
Interest income	3	4	11	11
Interest expense	(22)	(26)	(68)	(75)
Other income (expense), net	54	6	(111)	9
Equity in net income of subsidiaries	0	0	0	0
Intercompany interest and fees	0	0	0	0
Income from continuing operations before income taxes	271	237	586	618
Income tax expense	(31)	(49)	(130)	(86)
Income from continuing operations	240	188	456	532
Loss from discontinued operations, net of income taxes	(2)	(32)	3	(50)
Net income	238	156	459	482
Less: noncontrolling interest in subsidiaries net loss	(1)	0	(2)	(3)
Net income attributable to Tyco ordinary shareholders	239	156	461	485
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net revenue	0	0	0	0
Cost of product sales	0	0	0	0
Cost of services	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Merger costs	0		0
Restructuring and asset impairment charges, net	0	0	0	0
Operating (loss) income	0	0	0	0
Interest income	0	0	0	0
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Equity in net income of subsidiaries	(614)	(476)	(1,272)	(1,349)
Intercompany interest and fees	0	0	0	0
Income from continuing operations before income taxes	(614)	(476)	(1,272)	(1,349)
Income tax expense	0	0	0	0
Income from continuing operations	(614)	(476)	(1,272)	(1,349)
Loss from discontinued operations, net of income taxes	0	0	0	0
Net income	(614)	(476)	(1,272)	(1,349)
Less: noncontrolling interest in subsidiaries net loss	0	0	0	0
Net income attributable to Tyco ordinary shareholders	(614)	(476)	(1,272)	(1,349)
Tyco International plc
Condensed Financial Statements, Captions [Line Items]
Net revenue	0	0	0	0
Cost of product sales	0	0	0	0
Cost of services	0	0	0	0
Selling, general and administrative expenses	1	1	5	6
Merger costs	2		2
Restructuring and asset impairment charges, net	0	0	0	0
Operating (loss) income	(3)	(1)	(7)	(6)
Interest income	0	0	0	0
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Equity in net income of subsidiaries	225	145	388	440
Intercompany interest and fees	17	12	82	51
Income from continuing operations before income taxes	239	156	463	485
Income tax expense	0	0	(2)	0
Income from continuing operations	239	156	461	485
Loss from discontinued operations, net of income taxes	0	0	0	0
Net income	239	156	461	485
Less: noncontrolling interest in subsidiaries net loss	0	0	0	0
Net income attributable to Tyco ordinary shareholders	239	156	461	485
Tyco Fire & Security Finance SCA
Condensed Financial Statements, Captions [Line Items]
Net revenue	0	0	0	0
Cost of product sales	0	0	0	0
Cost of services	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Merger costs	0		0
Restructuring and asset impairment charges, net	0	0	0	0
Operating (loss) income	0	0	0	0
Interest income	0	0	0	0
Interest expense	0	0	0	0
Other income (expense), net	0	0	0	0
Equity in net income of subsidiaries	220	165	380	456
Intercompany interest and fees	0	0	0	0
Income from continuing operations before income taxes	220	165	380	456
Income tax expense	0	0	0	0
Income from continuing operations	220	165	380	456
Loss from discontinued operations, net of income taxes	0	0	0	0
Net income	220	165	380	456
Less: noncontrolling interest in subsidiaries net loss	0	0	0	0
Net income attributable to Tyco ordinary shareholders	220	165	380	456
Tyco International Finance S.A.
Condensed Financial Statements, Captions [Line Items]
Net revenue	0	0	0	0
Cost of product sales	0	0	0	0
Cost of services	0	0	0	0
Selling, general and administrative expenses	1	0	2	1
Merger costs	1		11
Restructuring and asset impairment charges, net	0	0	0	0
Operating (loss) income	(2)	0	(13)	(1)
Interest income	0	0	0	0
Interest expense	(22)	(25)	(67)	(73)
Other income (expense), net	54	1	(112)	3
Equity in net income of subsidiaries	169	166	504	453
Intercompany interest and fees	21	23	68	74
Income from continuing operations before income taxes	220	165	380	456
Income tax expense	0	0	0	0
Income from continuing operations	220	165	380	456
Loss from discontinued operations, net of income taxes	0	0	0	0
Net income	220	165	380	456
Less: noncontrolling interest in subsidiaries net loss	0	0	0	0
Net income attributable to Tyco ordinary shareholders	220	165	380	456
Other Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net revenue	2,449	2,489	7,156	7,397
Cost of product sales	1,026	1,025	2,956	3,046
Cost of services	508	548	1,550	1,645
Selling, general and administrative expenses	665	624	1,835	1,918
Merger costs	4		20
Restructuring and asset impairment charges, net	5	38	21	108
Operating (loss) income	241	254	774	680
Interest income	3	4	11	11
Interest expense	0	(1)	(1)	(2)
Other income (expense), net	0	5	1	6
Equity in net income of subsidiaries	0	0	0	0
Intercompany interest and fees	(38)	(35)	(150)	(125)
Income from continuing operations before income taxes	206	227	635	570
Income tax expense	(31)	(49)	(128)	(86)
Income from continuing operations	175	178	507	484
Loss from discontinued operations, net of income taxes	(2)	(32)	3	(50)
Net income	173	146	510	434
Less: noncontrolling interest in subsidiaries net loss	(1)	0	(2)	(3)
Net income attributable to Tyco ordinary shareholders	$ 174	$ 146	$ 512	$ 437