Equity (Schedule of Share Repurchases) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Class of Stock [Line Items]
Payments for Repurchase of Common Stock			$ 200	$ 225
Class A [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	0.1	1.0	2.4	3.4
Payments for Repurchase of Common Stock	$ 4	$ 79	$ 200	$ 225
Under share repurchase program | Class A [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	0.0	0.6	1.8	2.3
Payments for Repurchase of Common Stock	$ 0	$ 50	$ 150	$ 150
To fund certain obligations under equity compensation plans | Class A [Member]
Class of Stock [Line Items]
Treasury Stock, Shares, Acquired	0.1	0.4	0.6	1.1
Payments for Repurchase of Common Stock	$ 4	$ 29	$ 50	$ 75