Income Taxes Income Tax (Details) - USD ($) $ in Billions	3 Months Ended	6 Months Ended
Dec. 29, 2018	Mar. 28, 2020
Income Tax [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		23.00%
Unrecognized Tax Benefits		$ 2.9
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit		$ 0.1
Accounting Standards Update 2016-16
Income Tax [Line Items]
Adoption of new accounting guidance	$ 0.1

[Line Items] for Income Tax [Table]

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- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

+ References

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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Amount of unrecognized tax benefits.

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