Guarantor Financial Statements - CONDENSED CONSOLIDATING STATEMENT OF CASH FLOWS (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 24, 2016	Jun. 26, 2015
Cash Flows From Operating Activities:
Net cash provided by (used in) operating activities	$ 504	$ 511
Net cash used in discontinued operating activities	(12)	(1)
Cash Flows From Investing Activities:
Capital expenditures	(209)	(183)
Acquisition of businesses, net of cash acquired	(320)	(525)
Acquisition of dealer generated customer accounts and bulk account purchases	(17)	(13)
Divestiture of businesses, net of cash divested	14	(1)
Net increase (decrease) in intercompany loans	0	0
Increase in investment in subsidiaries	0
Sales and maturities of investments including restricted investments	26	283
Purchases of investments including restricted investments	(8)	(290)
Decrease in restricted cash	3	(27)
Other	0	4
Net cash provided by (used in) investing activities	(511)	(752)
Net cash provided by discontinued investing activities	4	(37)
Cash Flows From Financing Activities:
Proceeds from issuance of short-term debt	4,179	258
Repayment of short-term debt	(3,838)	(259)
Proceeds from issuance of long-term debt	0	570
Repayment of current portion of long-term debt	(1,134)	0
Proceeds from exercise of share options	57	70
Dividends paid	(261)	(237)
Repurchase of ordinary shares	0	(417)
Net intercompany loan repayments	0	0
Increase in equity from parent	0
Transfer to discontinued operations	(8)	(38)
Payment of contingent consideration	(1)	(23)
Debt financing costs	(23)	(5)
Other	(12)	(21)
Net cash (used in) provided by financing activities	(1,041)	(102)
Net cash provided by discontinued financing activities	8	38
Effect of currency translation on cash	(8)	(18)
Net decrease in cash and cash equivalents	(1,056)	(361)
Cash and cash equivalents at beginning of period	1,401	892
Cash and cash equivalents at end of period	345	531
Consolidating Adjustments
Cash Flows From Operating Activities:
Net cash provided by (used in) operating activities	0	0
Net cash used in discontinued operating activities	0	0
Cash Flows From Investing Activities:
Capital expenditures	0	0
Acquisition of businesses, net of cash acquired	0	0
Acquisition of dealer generated customer accounts and bulk account purchases	0	0
Divestiture of businesses, net of cash divested	0	0
Net increase (decrease) in intercompany loans	(37)	41
Increase in investment in subsidiaries	5
Sales and maturities of investments including restricted investments	0	0
Purchases of investments including restricted investments	0	0
Decrease in restricted cash	0	0
Other		0
Net cash provided by (used in) investing activities	(32)	41
Net cash provided by discontinued investing activities	0	0
Cash Flows From Financing Activities:
Proceeds from issuance of short-term debt	0	0
Repayment of short-term debt	0	0
Proceeds from issuance of long-term debt		0
Repayment of current portion of long-term debt	0
Proceeds from exercise of share options	0	0
Dividends paid	0	0
Repurchase of ordinary shares		0
Net intercompany loan repayments	37	(41)
Increase in equity from parent	(5)
Transfer to discontinued operations	0	0
Payment of contingent consideration	0	0
Debt financing costs		0
Other	0	0
Net cash (used in) provided by financing activities	32	(41)
Net cash provided by discontinued financing activities	0	0
Effect of currency translation on cash	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Tyco International plc
Cash Flows From Operating Activities:
Net cash provided by (used in) operating activities	216	94
Net cash used in discontinued operating activities	0	0
Cash Flows From Investing Activities:
Capital expenditures	0	0
Acquisition of businesses, net of cash acquired	0	0
Acquisition of dealer generated customer accounts and bulk account purchases	0	0
Divestiture of businesses, net of cash divested	0	0
Net increase (decrease) in intercompany loans	0	0
Increase in investment in subsidiaries	0
Sales and maturities of investments including restricted investments	0	0
Purchases of investments including restricted investments	0	0
Decrease in restricted cash	0	0
Other		0
Net cash provided by (used in) investing activities	0	0
Net cash provided by discontinued investing activities	0	0
Cash Flows From Financing Activities:
Proceeds from issuance of short-term debt	0	0
Repayment of short-term debt	0	0
Proceeds from issuance of long-term debt		0
Repayment of current portion of long-term debt	0
Proceeds from exercise of share options	57	63
Dividends paid	(261)	(237)
Repurchase of ordinary shares		0
Net intercompany loan repayments	0	83
Increase in equity from parent	0
Transfer to discontinued operations	0	0
Payment of contingent consideration	0	0
Debt financing costs	0	0
Other	(12)	(3)
Net cash (used in) provided by financing activities	(216)	(94)
Net cash provided by discontinued financing activities	0	0
Effect of currency translation on cash	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Tyco Fire & Security Finance SCA
Cash Flows From Operating Activities:
Net cash provided by (used in) operating activities	0	0
Net cash used in discontinued operating activities	0	0
Cash Flows From Investing Activities:
Capital expenditures	0	0
Acquisition of businesses, net of cash acquired	0	0
Acquisition of dealer generated customer accounts and bulk account purchases	0	0
Divestiture of businesses, net of cash divested	0	0
Net increase (decrease) in intercompany loans	0	0
Increase in investment in subsidiaries	0
Sales and maturities of investments including restricted investments	0	0
Purchases of investments including restricted investments	0	0
Decrease in restricted cash	0	0
Other		0
Net cash provided by (used in) investing activities	0	0
Net cash provided by discontinued investing activities	0	0
Cash Flows From Financing Activities:
Proceeds from issuance of short-term debt	0	0
Repayment of short-term debt	0	0
Proceeds from issuance of long-term debt		0
Repayment of current portion of long-term debt	0
Proceeds from exercise of share options	0	0
Dividends paid	0	0
Repurchase of ordinary shares		0
Net intercompany loan repayments	0	0
Increase in equity from parent	0
Transfer to discontinued operations	0	0
Payment of contingent consideration	0	0
Debt financing costs	0	0
Other	0	0
Net cash (used in) provided by financing activities	0	0
Net cash provided by discontinued financing activities	0	0
Effect of currency translation on cash	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Tyco International Finance S.A.
Cash Flows From Operating Activities:
Net cash provided by (used in) operating activities	775	(525)
Net cash used in discontinued operating activities	0	0
Cash Flows From Investing Activities:
Capital expenditures	0	0
Acquisition of businesses, net of cash acquired	0	0
Acquisition of dealer generated customer accounts and bulk account purchases	0	0
Divestiture of businesses, net of cash divested	0	0
Net increase (decrease) in intercompany loans	37	(41)
Increase in investment in subsidiaries	(5)
Sales and maturities of investments including restricted investments	7	4
Purchases of investments including restricted investments	0	(1)
Decrease in restricted cash	0	0
Other		0
Net cash provided by (used in) investing activities	39	(38)
Net cash provided by discontinued investing activities	0	0
Cash Flows From Financing Activities:
Proceeds from issuance of short-term debt	4,179	258
Repayment of short-term debt	(3,838)	(258)
Proceeds from issuance of long-term debt		567
Repayment of current portion of long-term debt	(1,134)
Proceeds from exercise of share options	0	0
Dividends paid	0	0
Repurchase of ordinary shares		0
Net intercompany loan repayments	0	0
Increase in equity from parent	0
Transfer to discontinued operations	0	0
Payment of contingent consideration	0	0
Debt financing costs	(21)	(5)
Other	0	1
Net cash (used in) provided by financing activities	(814)	563
Net cash provided by discontinued financing activities	0	0
Effect of currency translation on cash	0	0
Net decrease in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Other Subsidiaries
Cash Flows From Operating Activities:
Net cash provided by (used in) operating activities	(487)	942
Net cash used in discontinued operating activities	(12)	(1)
Cash Flows From Investing Activities:
Capital expenditures	(209)	(183)
Acquisition of businesses, net of cash acquired	(320)	(525)
Acquisition of dealer generated customer accounts and bulk account purchases	(17)	(13)
Divestiture of businesses, net of cash divested	14	(1)
Net increase (decrease) in intercompany loans	0	0
Increase in investment in subsidiaries	0
Sales and maturities of investments including restricted investments	19	279
Purchases of investments including restricted investments	(8)	(289)
Decrease in restricted cash	3	(27)
Other		4
Net cash provided by (used in) investing activities	(518)	(755)
Net cash provided by discontinued investing activities	4	(37)
Cash Flows From Financing Activities:
Proceeds from issuance of short-term debt	0	0
Repayment of short-term debt	0	(1)
Proceeds from issuance of long-term debt		3
Repayment of current portion of long-term debt	0
Proceeds from exercise of share options	0	7
Dividends paid	0	0
Repurchase of ordinary shares		(417)
Net intercompany loan repayments	(37)	(42)
Increase in equity from parent	5
Transfer to discontinued operations	(8)	(38)
Payment of contingent consideration	(1)	(23)
Debt financing costs	(2)	0
Other	0	(19)
Net cash (used in) provided by financing activities	(43)	(530)
Net cash provided by discontinued financing activities	8	38
Effect of currency translation on cash	(8)	(18)
Net decrease in cash and cash equivalents	(1,056)	(361)
Cash and cash equivalents at beginning of period	1,401	892
Cash and cash equivalents at end of period	$ 345	$ 531