Guarantor Financial Statements - CONDENSED CONSOLIDATING STATEMENT OF COMPREHENSIVE INCOME (LOSS) (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 income	$ 238	$ 156	$ 459	$ 482
Other comprehensive income (loss), net of tax
Foreign currency translation	6	28	7	(346)
Defined benefit and post retirement plans	5	4	13	13
Unrealized gain on marketable securities and derivative instruments, net of tax	3	(4)	6	(4)
Total other comprehensive income (loss), net of tax	14	28	26	(337)
Comprehensive income	252	184	485	145
Less: comprehensive loss attributable to noncontrolling interests	(1)	0	(2)	(3)
Comprehensive income attributable to Tyco ordinary shareholders	253	184	487	148
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net income	(614)	(476)	(1,272)	(1,349)
Other comprehensive income (loss), net of tax
Foreign currency translation	(6)	(28)	(7)	346
Defined benefit and post retirement plans	(5)	(4)	(13)	(13)
Unrealized gain on marketable securities and derivative instruments, net of tax	(3)	4	(6)	4
Total other comprehensive income (loss), net of tax	(14)	(28)	(26)	337
Comprehensive income	(628)	(504)	(1,298)	(1,012)
Less: comprehensive loss attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to Tyco ordinary shareholders	(628)	(504)	(1,298)	(1,012)
Tyco International plc
Condensed Financial Statements, Captions [Line Items]
Net income	239	156	461	485
Other comprehensive income (loss), net of tax
Foreign currency translation	6	28	7	(346)
Defined benefit and post retirement plans	5	4	13	13
Unrealized gain on marketable securities and derivative instruments, net of tax	3	(4)	6	(4)
Total other comprehensive income (loss), net of tax	14	28	26	(337)
Comprehensive income	253	184	487	148
Less: comprehensive loss attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to Tyco ordinary shareholders	253	184	487	148
Tyco Fire & Security Finance SCA
Condensed Financial Statements, Captions [Line Items]
Net income	220	165	380	456
Other comprehensive income (loss), net of tax
Foreign currency translation	0	0	0	0
Defined benefit and post retirement plans	0	0	0	0
Unrealized gain on marketable securities and derivative instruments, net of tax	0	0	0	0
Total other comprehensive income (loss), net of tax	0	0	0	0
Comprehensive income	220	165	380	456
Less: comprehensive loss attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to Tyco ordinary shareholders	220	165	380	456
Tyco International Finance S.A.
Condensed Financial Statements, Captions [Line Items]
Net income	220	165	380	456
Other comprehensive income (loss), net of tax
Foreign currency translation	(6)	(12)	(5)	3
Defined benefit and post retirement plans	0	0	0	0
Unrealized gain on marketable securities and derivative instruments, net of tax	0	0	0	0
Total other comprehensive income (loss), net of tax	(6)	(12)	(5)	3
Comprehensive income	214	153	375	459
Less: comprehensive loss attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to Tyco ordinary shareholders	214	153	375	459
Other Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net income	173	146	510	434
Other comprehensive income (loss), net of tax
Foreign currency translation	12	40	12	(349)
Defined benefit and post retirement plans	5	4	13	13
Unrealized gain on marketable securities and derivative instruments, net of tax	3	(4)	6	(4)
Total other comprehensive income (loss), net of tax	20	40	31	(340)
Comprehensive income	193	186	541	94
Less: comprehensive loss attributable to noncontrolling interests	(1)	0	(2)	(3)
Comprehensive income attributable to Tyco ordinary shareholders	$ 194	$ 186	$ 543	$ 97