Commitments, Contingencies and Debt Schedule of Debt Redemptions (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 28, 2019	Oct. 11, 2019	Oct. 03, 2019	Sep. 28, 2019
Two point seven zero zero percent Canadian dollar senior notes due 2020
Debt Instrument [Line Items]
Long-term debt, principal amount				$ 300
Two point seven zero zero percent Canadian dollar senior notes due 2020 | Subsequent event
Debt Instrument [Line Items]
Long-term debt, principal amount			$ 0
Early repayment of senior debt	$ 300
Two point eight zero zero percent senior notes due 2020
Debt Instrument [Line Items]
Long-term debt, principal amount				$ 1,500
Two point eight zero zero percent senior notes due 2020 | Subsequent event
Debt Instrument [Line Items]
Long-term debt, principal amount		$ 200
Early repayment of senior debt	$ 1,300