Tyco Electronics Group S.A. - Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 29, 2018	Jun. 30, 2017
Cash Flows From Operating Activities:
Net cash provided by (used in) continuing operating activities	$ 1,527	$ 1,449
Net cash provided by (used in) discontinued operating activities		(1)
Net cash provided by operating activities	1,527	1,448
Cash Flows From Investing Activities:
Capital expenditures	(686)	(452)
Proceeds from sale of property, plant, and equipment	19	12
Acquisition of business, net of cash acquired		(77)
Other	(8)	(21)
Net cash used in investing activities	(675)	(538)
Cash Flows From Financing Activities:
Net increase (decrease) in commercial paper	271	(162)
Proceeds from issuance of debt	119	89
Repayment of debt	(708)
Proceeds from exercise of share options	96	86
Repurchase of common shares	(611)	(376)
Payment of common share dividends to shareholders	(435)	(405)
Other	(34)	(24)
Net cash used in continuing financing activities	(1,302)	(792)
Net cash provided by discontinued financing activities		1
Net cash used in financing activities	(1,302)	(791)
Effect of currency translation on cash	2	(11)
Net increase (decrease) in cash and cash equivalents	(448)	108
Cash and cash equivalents at beginning of period	1,218	647
Cash and cash equivalents at end of period	770	755
Consolidating Adjustments
Cash Flows From Operating Activities:
Net cash provided by operating activities	(15)
Cash Flows From Investing Activities:
Intercompany distribution receipts	(61)
Change in intercompany loans	(261)	(16)
Other		(4)
Net cash used in investing activities	(322)	(20)
Cash Flows From Financing Activities:
Intercompany distributions	76
Loan activity with parent	261	16
Other		4
Net cash used in continuing financing activities		20
Net cash used in financing activities	337	20
TE Connectivity Ltd. | Consolidating Reportable entities
Cash Flows From Operating Activities:
Net cash provided by (used in) continuing operating activities		(159)
Net cash provided by operating activities	(152)	(159)
Cash Flows From Financing Activities:
Changes in parent company equity	83	67
Repurchase of common shares	(218)
Payment of common share dividends to shareholders	(441)	(407)
Loan activity with parent	728	499
Net cash used in continuing financing activities		159
Net cash used in financing activities	152	159
TEGSA | Consolidating Reportable entities
Cash Flows From Operating Activities:
Net cash provided by (used in) continuing operating activities		(58)
Net cash provided by operating activities	(34)	(58)
Cash Flows From Investing Activities:
Intercompany distribution receipts	61
Change in intercompany loans	261	16
Other		(8)
Net cash used in investing activities	322	8
Cash Flows From Financing Activities:
Changes in parent company equity	30	123
Net increase (decrease) in commercial paper	271	(162)
Proceeds from issuance of debt	119	89
Repayment of debt	(708)
Net cash used in continuing financing activities		50
Net cash used in financing activities	(288)	50
Other Subsidiaries | Consolidating Reportable entities
Cash Flows From Operating Activities:
Net cash provided by (used in) continuing operating activities		1,666
Net cash provided by (used in) discontinued operating activities		(1)
Net cash provided by operating activities	1,728	1,665
Cash Flows From Investing Activities:
Capital expenditures	(686)	(452)
Proceeds from sale of property, plant, and equipment	19	12
Acquisition of business, net of cash acquired		(77)
Other	(8)	(9)
Net cash used in investing activities	(675)	(526)
Cash Flows From Financing Activities:
Changes in parent company equity	(113)	(190)
Proceeds from exercise of share options	96	86
Repurchase of common shares	(393)	(376)
Payment of common share dividends to shareholders	6	2
Intercompany distributions	(76)
Loan activity with parent	(989)	(515)
Other	(34)	(28)
Net cash used in continuing financing activities		(1,021)
Net cash provided by discontinued financing activities		1
Net cash used in financing activities	(1,503)	(1,020)
Effect of currency translation on cash	2	(11)
Net increase (decrease) in cash and cash equivalents	(448)	108
Cash and cash equivalents at beginning of period	1,218	647
Cash and cash equivalents at end of period	$ 770	$ 755