Equity (Details) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2020 installment $ / shares shares	Mar. 27, 2020 USD ($) $ / shares	Mar. 29, 2019 USD ($) $ / shares	Mar. 27, 2020 USD ($) $ / shares shares	Mar. 29, 2019 USD ($) $ / shares shares	Sep. 27, 2019 USD ($)
Equity
Maximum percentage of shares that the board may authorize for issuance	50.00%
Cancellation of treasury shares (in shares) | shares	12
Dividends paid per common share | $ / shares		$ 0.46	$ 0.44	$ 0.92	$ 0.88
Dividend or cash distribution approved (in currency per share) | $ / shares	$ 1.92
Number of quarterly dividend installments | installment	4
Cash distribution quarterly installment payable (in dollars per share) | $ / shares	$ 0.48
Unpaid portion of the dividend payment recorded in accrued and other current liabilities | $		$ 636		$ 636		$ 308
Number of common shares repurchased | shares				5	9
Repurchase value | $		280	$ 189	$ 423	$ 684
Amount available for repurchase, at end of period | $		$ 1,100		$ 1,100