Tyco Electronics Group S.A. - Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 27, 2019	Dec. 28, 2018
Statement of Operations Detail:
Net sales	$ 3,168	$ 3,347
Cost of sales	2,138	2,233
Gross margin	1,030	1,114
Selling, general, and administrative expenses, net	367	389
Research, development, and engineering expenses	161	161
Acquisition and integration costs	7	5
Restructuring and other charges, net	24	75
Operating income	471	484
Interest income	6	5
Interest expense	(12)	(27)
Other income (expense), net	5	(1)
Income from continuing operations before income taxes	470	461
Income tax expense	(447)	(78)
Income from continuing operations	23	383
Income (loss) from discontinued operations, net of income taxes	3	(107)
Net income	26	276
Other comprehensive income	89	49
Comprehensive income	115	325
Consolidating Adjustments
Statement of Operations Detail:
Equity in net income of subsidiaries	(175)	(830)
Equity in net income (loss) of subsidiaries of discontinued operations	(3)	156
Income from continuing operations before income taxes	(178)	(674)
Income from continuing operations	(178)	(674)
Net income	(178)	(674)
Other comprehensive income	(197)	(84)
Comprehensive income	(375)	(758)
TE Connectivity Ltd. | Reportable entities
Statement of Operations Detail:
Selling, general, and administrative expenses, net	26	35
Acquisition and integration costs	1
Operating income	(27)	(35)
Equity in net income of subsidiaries	74	441
Equity in net income (loss) of subsidiaries of discontinued operations	3	(107)
Intercompany interest income (expense), net	(24)	(23)
Income from continuing operations before income taxes	26	276
Income from continuing operations	26	276
Net income	26	276
Other comprehensive income	89	49
Comprehensive income	115	325
Intercompany transaction gains (losses)	14
TEGSA | Reportable entities
Statement of Operations Detail:
Selling, general, and administrative expenses, net	16	(107)
Operating income	(16)	107
Interest expense	(10)	(27)
Equity in net income of subsidiaries	101	389
Equity in net income (loss) of subsidiaries of discontinued operations		(49)
Intercompany interest income (expense), net	(1)	(28)
Income from continuing operations before income taxes	74	392
Income from continuing operations	74	392
Income (loss) from discontinued operations, net of income taxes	3	(58)
Net income	77	334
Other comprehensive income	89	49
Comprehensive income	166	383
Intercompany transaction gains (losses)	(13)	110
Other Subsidiaries | Reportable entities
Statement of Operations Detail:
Net sales	3,168	3,347
Cost of sales	2,138	2,233
Gross margin	1,030	1,114
Selling, general, and administrative expenses, net	325	461
Research, development, and engineering expenses	161	161
Acquisition and integration costs	6	5
Restructuring and other charges, net	24	75
Operating income	514	412
Interest income	6	5
Interest expense	(2)
Other income (expense), net	5	(1)
Intercompany interest income (expense), net	25	51
Income from continuing operations before income taxes	548	467
Income tax expense	(447)	(78)
Income from continuing operations	101	389
Income (loss) from discontinued operations, net of income taxes		(49)
Net income	101	340
Other comprehensive income	108	35
Comprehensive income	$ 209	$ 375