Significant Accounting Policies and Recent Accounting Standards - Effect of ASC 606 and ASU 2017-07 on Condensed Consolidated Statement of Income (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Dec. 28, 2018	Sep. 28, 2018	Dec. 29, 2017	Sep. 29, 2017	Dec. 28, 2018	Dec. 29, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from product sales and services	$ 1,666		$ 1,535		$ 3,208	$ 2,945
Cost of product sales and services	(1,095)		(1,022)		(2,105)	(1,941)
Engineering, selling and administrative expenses	(304)		(291)		(583)	(559)
Non-operating income	47		44		94	90
Interest income	0		1		1	1
Interest expense	(43)		(42)		(87)	(83)
Income from continuing operations before income taxes	271		225		528	453
Income taxes	(46)		(94)		(87)	(157)
Income from continuing operations	225		131		441	296
Discontinued operations, net of income taxes	0		0		(3)	(6)
Net income	$ 225	$ 213	$ 131	$ 159	$ 438	$ 290
Basic
Continuing operations (in dollars per share)	$ 1.91		$ 1.10		$ 3.74	$ 2.49
Discontinued operations (in dollars per share)	0.00		0.00		(0.03)	(0.06)
Basic (in dollars per share)	1.91		1.10		3.71	2.43
Diluted
Continuing operations (in dollars per share)	1.88		1.08		3.66	2.44
Discontinued operations (in dollars per share)	(0.01)		0.00		(0.02)	(0.05)
Diluted (in dollars per share)	$ 1.87		$ 1.08		$ 3.64	$ 2.39
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from product sales and services			$ 1,535			$ 2,948
Cost of product sales and services			(987)			(1,872)
Engineering, selling and administrative expenses			(276)			(532)
Non-operating income			(2)			(2)
Interest income			1			1
Interest expense			(42)			(83)
Income from continuing operations before income taxes			229			460
Income taxes			(90)			(154)
Income from continuing operations			139			306
Discontinued operations, net of income taxes			0			(6)
Net income			$ 139			$ 300
Basic
Continuing operations (in dollars per share)			$ 1.17			$ 2.57
Discontinued operations (in dollars per share)			0.00			(0.05)
Basic (in dollars per share)			1.17			2.52
Diluted
Continuing operations (in dollars per share)			1.15			2.52
Discontinued operations (in dollars per share)			0.00			(0.05)
Diluted (in dollars per share)			$ 1.15			$ 2.47
Restatement Adjustment | Effect of Adopting ASC 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from product sales and services			$ 0			$ (3)
Cost of product sales and services			1			4
Engineering, selling and administrative expenses			(5)			(8)
Non-operating income			0			0
Interest income			0			0
Interest expense			0			0
Income from continuing operations before income taxes			(4)			(7)
Income taxes			(4)			(3)
Income from continuing operations			(8)			(10)
Discontinued operations, net of income taxes			0			0
Net income			$ (8)			$ (10)
Basic
Continuing operations (in dollars per share)			$ (0.07)			$ (0.08)
Discontinued operations (in dollars per share)			0.00			(0.01)
Basic (in dollars per share)			(0.07)			(0.09)
Diluted
Continuing operations (in dollars per share)			(0.07)			(0.08)
Discontinued operations (in dollars per share)			0.00			0.00
Diluted (in dollars per share)			$ (0.07)			$ (0.08)
Restatement Adjustment | Effect of Adopting ASU 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenue from product sales and services			$ 0			$ 0
Cost of product sales and services			(36)			(73)
Engineering, selling and administrative expenses			(10)			(19)
Non-operating income			46			92
Interest income			0			0
Interest expense			0			0
Income from continuing operations before income taxes			0			0
Income taxes			0			0
Income from continuing operations			0			0
Discontinued operations, net of income taxes			0			0
Net income			$ 0			$ 0
Basic
Continuing operations (in dollars per share)			$ 0.00			$ 0.00
Discontinued operations (in dollars per share)			0.00			0.00
Basic (in dollars per share)			0.00			0.00
Diluted
Continuing operations (in dollars per share)			0.00			0.00
Discontinued operations (in dollars per share)			0.00			0.00
Diluted (in dollars per share)			$ 0.00			$ 0.00