Shareholders' Equity (Details) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 29, 2019 USD ($) installment $ / shares shares	Mar. 29, 2019 USD ($) installment $ / shares	Mar. 30, 2018 USD ($) $ / shares	Mar. 29, 2019 USD ($) installment $ / shares shares	Mar. 30, 2018 USD ($) $ / shares shares	Mar. 27, 2020 $ / shares	Dec. 27, 2019 $ / shares	Sep. 27, 2019 $ / shares	Jun. 28, 2019 $ / shares	Sep. 28, 2018 USD ($)
Shareholders' Equity
Cancellation of treasury shares (in shares) | shares	6
Cash dividend paid (in dollars per share) | $ / shares		$ 0.44	$ 0.40	$ 0.88	$ 0.80
Dividend or cash distribution approved (in currency per share) | $ / shares	$ 1.84
Number of quarterly dividend installments | installment	4	4		4
Cash distribution quarterly installment payable (in dollars per share) | $ / shares						$ 0.46	$ 0.46	$ 0.46	$ 0.46
Unpaid portion of the dividend payment recorded in accrued and other current liabilities	$ 620	$ 620		$ 620						$ 303
Share repurchase program, increase in authorized amount				$ 1,500
Number of common shares repurchased | shares				9	4
Repurchase value		189	$ 169	$ 684	$ 383
Amount available for repurchase, at end of period	$ 1,800	$ 1,800		$ 1,800