Tyco Electronics Group S.A. - Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 28, 2019	Jun. 29, 2018
Cash flows from operating activities:
Net cash provided by (used in) continuing operating activities	$ 1,575	$ 1,379
Net cash provided by (used in) discontinued operating activities	(31)	148
Net cash provided by operating activities	1,544	1,527
Cash flows from investing activities:
Capital expenditures	(570)	(673)
Proceeds from sale of property, plant, and equipment	16	19
Acquisition of businesses, net of cash acquired	(283)
Proceeds from divestiture of discontinued operation, net of cash retained by sold operation	297
Other	3	(8)
Net cash used in continuing investing activities	(537)	(662)
Net cash used in discontinued investing activities	(2)	(13)
Net cash used in investing activities	(539)	(675)
Cash flows from financing activities:
Net increase (decrease) in commercial paper	(270)	271
Proceeds from issuance of debt	746	119
Repayment of debt	(441)	(708)
Proceeds from exercise of share options	55	96
Repurchase of common shares	(913)	(611)
Payment of common share dividends to shareholders	(454)	(435)
Transfers (to) from discontinued operations	(33)	135
Other	(32)	(34)
Net cash used in continuing financing activities	(1,342)	(1,167)
Net cash provided by (used in) discontinued financing activities	33	(135)
Net cash used in financing activities	(1,309)	(1,302)
Effect of currency translation on cash	2	2
Net decrease in cash, cash equivalents, and restricted cash	(302)	(448)
Cash, cash equivalents, and restricted cash at beginning of period	848	1,218
Cash, cash equivalents, and restricted cash at end of period	546	770
Consolidating Adjustments
Cash flows from operating activities:
Net cash provided by (used in) continuing operating activities	(4,301)	(15)
Net cash provided by operating activities	(4,301)	(15)
Cash flows from investing activities:
Intercompany distribution receipts		(61)
Change in intercompany loans	(1,045)	(261)
Net cash used in continuing investing activities	(1,045)	(322)
Net cash used in investing activities	(1,045)	(322)
Cash flows from financing activities:
Intercompany distributions	4,301	76
Loan activity with parent	1,045	261
Net cash used in continuing financing activities	5,346	337
Net cash used in financing activities	5,346	337
TE Connectivity Ltd. | Reportable entities
Cash flows from operating activities:
Net cash provided by (used in) continuing operating activities	(198)	(152)
Net cash provided by operating activities	(198)	(152)
Cash flows from financing activities:
Changes in parent company equity	57	83
Repurchase of common shares	(892)	(218)
Payment of common share dividends to shareholders	(454)	(441)
Loan activity with parent	1,487	728
Net cash used in continuing financing activities	198	152
Net cash used in financing activities	198	152
TEGSA | Reportable entities
Cash flows from operating activities:
Net cash provided by (used in) continuing operating activities	4,172	(34)
Net cash provided by operating activities	4,172	(34)
Cash flows from investing activities:
Proceeds from divestiture of discontinued operation, net of cash retained by sold operation	312
Intercompany distribution receipts		61
Change in intercompany loans	1,045	261
Net cash used in continuing investing activities	1,357	322
Net cash used in investing activities	1,357	322
Cash flows from financing activities:
Changes in parent company equity	(5,560)	30
Net increase (decrease) in commercial paper	(270)	271
Proceeds from issuance of debt	746	119
Repayment of debt	(441)	(708)
Other	(4)
Net cash used in continuing financing activities	(5,529)	(288)
Net cash used in financing activities	(5,529)	(288)
Non-Guarantor Subsidiaries
Cash flows from financing activities:
Intercompany distributions	(4,301)	(76)
Non-Guarantor Subsidiaries | Reportable entities
Cash flows from operating activities:
Net cash provided by (used in) continuing operating activities	1,902	1,580
Net cash provided by (used in) discontinued operating activities	(31)	148
Net cash provided by operating activities	1,871	1,728
Cash flows from investing activities:
Capital expenditures	(570)	(673)
Proceeds from sale of property, plant, and equipment	16	19
Acquisition of businesses, net of cash acquired	(283)
Proceeds from divestiture of discontinued operation, net of cash retained by sold operation	(15)
Other	3	(8)
Net cash used in continuing investing activities	(849)	(662)
Net cash used in discontinued investing activities	(2)	(13)
Net cash used in investing activities	(851)	(675)
Cash flows from financing activities:
Changes in parent company equity	5,503	(113)
Proceeds from exercise of share options	55	96
Repurchase of common shares	(21)	(393)
Payment of common share dividends to shareholders		6
Intercompany distributions	(4,301)	(76)
Loan activity with parent	(2,532)	(989)
Transfers (to) from discontinued operations	(33)	135
Other	(28)	(34)
Net cash used in continuing financing activities	(1,357)	(1,368)
Net cash provided by (used in) discontinued financing activities	33	(135)
Net cash used in financing activities	(1,324)	(1,503)
Effect of currency translation on cash	2	2
Net decrease in cash, cash equivalents, and restricted cash	(302)	(448)
Cash, cash equivalents, and restricted cash at beginning of period	848	1,218
Cash, cash equivalents, and restricted cash at end of period	$ 546	$ 770