Charge related to effects of Non US jurisdiction tax matter.

No definition available.

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- Definition

Income tax disclosure [Line Items]

+ References

No definition available.

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- Definition

Unrecognized Tax Benefits that Would Impact Effective Tax Rate, Resulting Change in Valuation Allowance

+ References

No definition available.

+ Details

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- Definition

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

+ References

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-Publisher FASB
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Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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- Definition

Estimated amount of loss resulting from an adverse tax position.

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- Definition

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.

+ References

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- Definition

Amount of unrecognized tax benefits.

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- Definition

Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

+ References

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- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

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- Definition

Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2020	Dec. 28, 2019	Sep. 30, 2016	Sep. 30, 2020
Income Tax Disclosure [Line Items]
Federal statutory income tax rate	21.00%	21.00%
Charge related to effects of Non US Jurisdiction Tax Matter	$ 35.3
US Income taxes on repatriated foreign earnings	2.9
Unrecognized tax benefits	46.3			$ 16.1
Income tax provision upon recognition of unrecognized tax benefit	46.3
Unrecognized tax benefits that would impact valuation allowance	7.9
Potential decrease in unrecognized tax benefits	30.0
Onshape
Income Tax Disclosure [Line Items]
Reduction of valuation allowance		$ 21.0
KOREA, REPUBLIC OF
Income Tax Disclosure [Line Items]
Charge related to effects of unrecognized tax benefit	$ 32.4
Income tax examination, estimate of possible loss			$ 12.0