Guarantor Financial Statements - CONDENSED CONSOLIDATING BALANCE SHEET (Details) - USD ($) $ in Millions	Jun. 24, 2016	Sep. 25, 2015	Jun. 26, 2015	Sep. 26, 2014
Current Assets:
Cash and cash equivalents	$ 345	$ 1,401	$ 531	$ 892
Accounts receivable, net	1,805	1,722
Inventories	656	620
Intercompany receivables	0	0
Prepaid expenses and other current assets	883	750
Deferred income taxes	62	62
Assets held for sale	71	208
Total Current Assets	3,822	4,763
Property, plant and equipment, net	1,180	1,166
Goodwill	4,418	4,203		4,088
Intangible assets, net	966	822
Investment in subsidiaries	0	0
Intercompany loans receivable	0	0
Other assets	1,228	1,367
Total Assets	11,614	12,321
Current Liabilities:
Loans payable and current maturities of long-term debt	341	987
Accounts payable	799	764
Accrued and other current liabilities	1,564	1,644
Deferred revenue	378	379
Intercompany payables	0	0
Liabilities held for sale	34	80
Total Current Liabilities	3,116	3,854
Long-term debt	2,165	2,159
Intercompany loans payable	0	0
Deferred revenue	284	302
Other liabilities	1,663	1,930
Total Liabilities	7,228	8,245
Tyco Shareholders' Equity:
Ordinary shares	4	4
Ordinary shares held in treasury	(15)	(3)
Other shareholders' equity	4,362	4,040
Total Tyco Shareholders' Equity	4,351	4,041
Nonredeemable noncontrolling interest	35	35
Total Equity	4,386	4,076	4,339	4,670
Total Liabilities and Equity	11,614	12,321
Consolidating Adjustments
Current Assets:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Intercompany receivables	(8,313)	(6,855)
Prepaid expenses and other current assets	0	0
Deferred income taxes	0	0
Assets held for sale	0	0
Total Current Assets	(8,313)	(6,855)
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets, net	0	0
Investment in subsidiaries	(39,489)	(38,018)
Intercompany loans receivable	(30,153)	(8,008)
Other assets	0	0
Total Assets	(77,955)	(52,881)
Current Liabilities:
Loans payable and current maturities of long-term debt	0	0
Accounts payable	0	0
Accrued and other current liabilities	0	0
Deferred revenue	0	0
Intercompany payables	(8,313)	(6,855)
Liabilities held for sale	0	0
Total Current Liabilities	(8,313)	(6,855)
Long-term debt	0	0
Intercompany loans payable	(30,153)	(8,008)
Deferred revenue	0	0
Other liabilities	0	0
Total Liabilities	(38,466)	(14,863)
Tyco Shareholders' Equity:
Ordinary shares	0	0
Ordinary shares held in treasury	0	0
Other shareholders' equity	(39,489)	(38,018)
Total Tyco Shareholders' Equity	(39,489)	(38,018)
Nonredeemable noncontrolling interest	0	0
Total Equity	(39,489)	(38,018)
Total Liabilities and Equity	(77,955)	(52,881)
Tyco International plc
Current Assets:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Intercompany receivables	10	15
Prepaid expenses and other current assets	1	0
Deferred income taxes	0	0
Assets held for sale	0	0
Total Current Assets	11	15
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets, net	0	0
Investment in subsidiaries	11,339	10,885
Intercompany loans receivable	0	0
Other assets	0	1
Total Assets	11,350	10,901
Current Liabilities:
Loans payable and current maturities of long-term debt	0	0
Accounts payable	1	1
Accrued and other current liabilities	90	88
Deferred revenue	0	0
Intercompany payables	3,736	3,616
Liabilities held for sale	0	0
Total Current Liabilities	3,827	3,705
Long-term debt	0	0
Intercompany loans payable	3,172	3,155
Deferred revenue	0	0
Other liabilities	0	0
Total Liabilities	6,999	6,860
Tyco Shareholders' Equity:
Ordinary shares	4	4
Ordinary shares held in treasury	(15)	(3)
Other shareholders' equity	4,362	4,040
Total Tyco Shareholders' Equity	4,351	4,041
Nonredeemable noncontrolling interest	0	0
Total Equity	4,351	4,041
Total Liabilities and Equity	11,350	10,901
Tyco Fire & Security Finance SCA
Current Assets:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Intercompany receivables	0	0
Prepaid expenses and other current assets	0	0
Deferred income taxes	0	0
Assets held for sale	0	0
Total Current Assets	0	0
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets, net	0	0
Investment in subsidiaries	11,581	11,140
Intercompany loans receivable	0	0
Other assets	0	0
Total Assets	11,581	11,140
Current Liabilities:
Loans payable and current maturities of long-term debt	0	0
Accounts payable	0	0
Accrued and other current liabilities	0	0
Deferred revenue	0	0
Intercompany payables	0	0
Liabilities held for sale	0	0
Total Current Liabilities	0	0
Long-term debt	0	0
Intercompany loans payable	0	0
Deferred revenue	0	0
Other liabilities	0	0
Total Liabilities	0	0
Tyco Shareholders' Equity:
Ordinary shares	0	0
Ordinary shares held in treasury	0	0
Other shareholders' equity	11,581	11,140
Total Tyco Shareholders' Equity	11,581	11,140
Nonredeemable noncontrolling interest	0	0
Total Equity	11,581	11,140
Total Liabilities and Equity	11,581	11,140
Tyco International Finance S.A.
Current Assets:
Cash and cash equivalents	0	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Intercompany receivables	553	332
Prepaid expenses and other current assets	56	63
Deferred income taxes	0	0
Assets held for sale	0	0
Total Current Assets	609	395
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangible assets, net	0	0
Investment in subsidiaries	16,569	15,993
Intercompany loans receivable	13,987	2,942
Other assets	21	44
Total Assets	31,186	19,374
Current Liabilities:
Loans payable and current maturities of long-term debt	341	967
Accounts payable	0	0
Accrued and other current liabilities	61	61
Deferred revenue	0	0
Intercompany payables	4,023	2,892
Liabilities held for sale	0	0
Total Current Liabilities	4,425	3,920
Long-term debt	2,164	2,158
Intercompany loans payable	12,994	1,911
Deferred revenue	0	0
Other liabilities	22	245
Total Liabilities	19,605	8,234
Tyco Shareholders' Equity:
Ordinary shares	0	0
Ordinary shares held in treasury	0	0
Other shareholders' equity	11,581	11,140
Total Tyco Shareholders' Equity	11,581	11,140
Nonredeemable noncontrolling interest	0	0
Total Equity	11,581	11,140
Total Liabilities and Equity	31,186	19,374
Other Subsidiaries
Current Assets:
Cash and cash equivalents	345	1,401	$ 531	$ 892
Accounts receivable, net	1,805	1,722
Inventories	656	620
Intercompany receivables	7,750	6,508
Prepaid expenses and other current assets	826	687
Deferred income taxes	62	62
Assets held for sale	71	208
Total Current Assets	11,515	11,208
Property, plant and equipment, net	1,180	1,166
Goodwill	4,418	4,203
Intangible assets, net	966	822
Investment in subsidiaries	0	0
Intercompany loans receivable	16,166	5,066
Other assets	1,207	1,322
Total Assets	35,452	23,787
Current Liabilities:
Loans payable and current maturities of long-term debt	0	20
Accounts payable	798	763
Accrued and other current liabilities	1,413	1,495
Deferred revenue	378	379
Intercompany payables	554	347
Liabilities held for sale	34	80
Total Current Liabilities	3,177	3,084
Long-term debt	1	1
Intercompany loans payable	13,987	2,942
Deferred revenue	284	302
Other liabilities	1,641	1,685
Total Liabilities	19,090	8,014
Tyco Shareholders' Equity:
Ordinary shares	0	0
Ordinary shares held in treasury	0	0
Other shareholders' equity	16,327	15,738
Total Tyco Shareholders' Equity	16,327	15,738
Nonredeemable noncontrolling interest	35	35
Total Equity	16,362	15,773
Total Liabilities and Equity	$ 35,452	$ 23,787