CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 25, 2016	Mar. 27, 2015	Mar. 25, 2016	Mar. 27, 2015
Income Statement [Abstract]
Revenue from product sales	$ 1,398	$ 1,458	$ 2,806	$ 2,946
Service revenue	933	972	1,901	1,962
Net revenue	2,331	2,430	4,707	4,908
Cost of product sales	968	999	1,930	2,021
Cost of services	506	550	1,042	1,097
Selling, general and administrative expenses	602	648	1,175	1,300
Separation Transaction and Merger Costs	26	0	26	0
Restructuring and asset impairment charges, net	4	12	16	70
Operating income	225	221	518	420
Interest income	4	4	8	7
Interest expense	(22)	(25)	(46)	(49)
Other (expense) income, net	0	(1)	(165)	3
Income from continuing operations before income taxes	207	199	315	381
Income tax expense	(63)	(18)	(99)	(37)
Income from continuing operations	144	181	216	344
Income (loss) from discontinued operations, net of income taxes	1	(16)	5	(18)
Net income	145	165	221	326
Less: noncontrolling interest in subsidiaries net loss	(1)	(2)	(1)	(3)
Net income attributable to Tyco ordinary shareholders	146	167	222	329
Amounts attributable to Tyco ordinary shareholders:
Income from continuing operations	145	183	217	347
Income (loss) from discontinued operations	1	(16)	5	(18)
Net income attributable to Tyco ordinary shareholders	$ 146	$ 167	$ 222	$ 329
Basic earnings per share attributable to Tyco ordinary shareholders:
Income from continuing operations (in dollars per share)	$ 0.34	$ 0.44	$ 0.51	$ 0.83
Income from discontinued operations (in dollars per share)	0.00	(0.04)	0.01	(0.05)
Net income attributable to Tyco common shareholders (in dollars per share)	0.34	0.40	0.52	0.78
Diluted earnings per share attributable to Tyco ordinary shareholders:
Income from continuing operations (in dollars per share)	0.33	0.43	0.51	0.81
Income from discontinued operations (in dollars per share)	0.01	(0.04)	0.01	(0.04)
Net income attributable to Tyco common shareholders (in dollars per share)	$ 0.34	$ 0.39	$ 0.52	$ 0.77
Weighted average number of shares outstanding:
Basic (in shares)	425	420	424	420
Diluted (in shares)	428	427	428	427