Quarterly Financial Data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Sep. 27, 2019	Jun. 28, 2019	Mar. 29, 2019	Dec. 28, 2018	Sep. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 29, 2017	Sep. 27, 2019	Sep. 28, 2018	Sep. 29, 2017
Net sales	$ 3,300	$ 3,389	$ 3,412	$ 3,347	$ 3,509	$ 3,581	$ 3,562	$ 3,336	$ 13,448	$ 13,988	$ 12,185
Gross margin	1,052	1,110	1,118	1,114	1,182	1,187	1,212	1,164	4,394	4,745	4,183
Acquisition and integration costs	6	9	7	5	5	4	3	2	27	14	6
Restructuring and other charges, net	71	67	42	75	22	64	6	34	255	126	147
Pre tax loss on sale									86	2	(3)
Income tax benefit related to tax impacts of Swiss Tax Reform		214							216
Income tax benefit related to a tax settlement in a non-U.S. jurisdictions		93							90
Income tax expense related to tax impacts of the Tax Cuts and Jobs Act								567		567
Net income tax benefit (expense) associated with certain legal entity restructurings and intercompany transactions					1,222				(15)
Amounts attributable to TE Connectivity Ltd.:
Income (loss) from continuing operations	376	758	429	383	1,674	453	490	(33)	1,946	2,584	1,540
Income (loss) from discontinued operations, net of income taxes	(4)	(1)	10	(107)	(13)	1		(7)	(102)	(19)	143
Net income	$ 372	$ 757	$ 439	$ 276	$ 1,661	$ 454	$ 490	$ (40)	$ 1,844	$ 2,565	$ 1,683
Basic earnings (loss) per share attributable to TE Connectivity Ltd.:
Income (loss) from continuing operations (in dollars per share)	$ 1.12	$ 2.25	$ 1.27	$ 1.12	$ 4.82	$ 1.30	$ 1.40	$ (0.09)	$ 5.76	$ 7.38	$ 4.34
Net income (loss) (in dollars per share)	1.11	2.25	1.30	0.81	4.79	1.30	1.40	(0.11)	5.46	7.33	4.74
Diluted earnings (loss) per share attributable to TE Connectivity Ltd.:
Income (loss) from continuing operations (in dollars per share)	1.11	2.24	1.26	1.11	4.78	1.29	1.38	(0.09)	5.72	7.32	4.30
Net income (loss) (in dollars per share)	$ 1.10	$ 2.23	$ 1.29	$ 0.80	$ 4.75	$ 1.29	$ 1.38	$ (0.11)	$ 5.42	$ 7.27	$ 4.70
Subsea Communications
Pre tax loss on sale				$ 86