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Income Taxes (Tables)

12 Months Ended

Sep. 30, 2020

Income Tax Disclosure [Abstract]

Schedule of Pre-tax Income (Loss) from Continuing Operations

Pre-tax income was taxed in the following jurisdictions (in millions):

		Fiscal Year Ended September 30,
		2020				2019				2018
Domestic		$	429.7			$	697.9			$	514.9
Foreign			9.4				52.8				79.7
		$	439.1			$	750.7			$	594.6

Schedule of Components of Provision for (Benefit from) Income Taxes

Significant components of the provision for income taxes were as follows (in millions):

		Fiscal Year Ended September 30,
		2020				2019				2018
Allocated to Income Before Earnings (Losses) of Unconsolidated Affiliates
Current:
Federal		$	70.1			$	140.9			$	92.0
Foreign			8.2				(0.2	)			22.0
State			12.1				20.2				12.9
Total current			90.4				160.9				126.9
Deferred:
Federal			14.3				2.1				5.4
Foreign			9.7				7.3				(5.5	)
State			(1.6	)			1.0				(3.0	)
Total deferred			22.4				10.4				(3.1	)
		$	112.8			$	171.3			$	123.8
Allocated to Other Comprehensive Income (Loss)
Deferred federal, state and foreign		$	8.8			$	(14.9	)		$	11.0

Schedule of Reconciliation of Income Tax Computed at U.S. Federal Statutory Tax Rates to Income Tax Expense

The reconciliation of income tax computed at the U.S. federal statutory tax rates to income tax expense was:

		Fiscal Year Ended September 30,
		2020				2019				2018
Effective Rate Reconciliation
U.S. federal tax rate			21.0	%			21.0	%			24.5	%
State income taxes, net			2.8	%			2.5	%			2.1	%
Foreign taxes			0.8	%			-0.2	%			1.0	%
Valuation allowance			3.3	%			-0.1	%			-1.4	%
Domestic tax credits			-3.2	%			-1.0	%			-2.1	%
Manufacturing deduction			—	%			-0.1	%			-1.6	%
Foreign-derived intangible income deduction			-0.4	%			-1.0	%			—	%
Share-based compensation			—	%			0.1	%			-0.7	%
Remeasurement of deferred taxes - U.S. Tax Reform			—	%			—	%			-5.1	%
Mandatory repatriation tax - U.S. Tax Reform			—	%			0.7	%			3.3	%
Other, net			1.4	%			0.9	%			0.8	%
			25.7	%			22.8	%			20.8	%

Components of Deferred Income Tax Assets and Liabilities

Deferred income tax assets and liabilities were comprised of the following (in millions):

		September 30,
		2020				2019
Deferred tax assets:
Other long-term liabilities		$	127.0			$	126.0
Losses and credits			34.8				27.9
Accrued warranty			15.8				14.5
Other current liabilities			17.7				15.0
Payroll-related obligations			18.5				23.4
Other			6.0				9.4
Gross deferred tax assets			219.8				216.2
Less valuation allowance			(17.4	)			(1.1	)
Deferred tax assets, net			202.4				215.1
Deferred tax liabilities:
Intangible assets			(42.2	)			(40.0	)
Property, plant and equipment			(55.9	)			(50.5	)
Inventories			(18.6	)			(14.1	)
Other			(7.1	)			(2.6	)
Deferred tax liabilities			(123.8	)			(107.2	)
Deferred tax assets, net of deferred tax liabilities		$	78.6			$	107.9

Schedule of Classification of Deferred Tax Asset in Consolidated Balance Sheets

The net deferred tax asset is classified in the Consolidated Balance Sheets as follows (in millions):

		September 30,
		2020				2019
Long-term net deferred tax asset		$	78.6			$	107.9
Long-term net deferred tax liability			—				—
Net deferred tax asset (liability)		$	78.6			$	107.9

Schedule of Reconciliation of Unrecognized Tax Benefits

A reconciliation of gross unrecognized tax benefits, excluding interest and penalties, was as follows (in millions):

		Fiscal Year Ended September 30,
		2020				2019				2018
Balance at beginning of year		$	97.3			$	33.7			$	37.2
Additions for tax positions related to current year			46.2				63.3				4.2
Additions for tax positions related to prior years			1.4				5.4				5.4
Reductions for tax positions related to prior years			(61.8	)			(0.8	)			(7.1	)
Settlements			(1.3	)			(0.9	)			(4.1	)
Lapse of statutes of limitations			(2.0	)			(3.4	)			(1.9	)
Balance at end of year		$	79.8			$	97.3			$	33.7

Schedule of Tax Years Open for Examination Under Applicable Statutes

As of September 30, 2020, tax years open for examination under applicable statutes were as follows:

Tax Jurisdiction		Open Tax Years
Australia		2013 - 2020
Belgium		2018 - 2020
Brazil		2015 - 2020
Canada		2016 - 2020
China		2015 - 2020
Mexico		2016 - 2020
Romania		2014 - 2020
Netherlands		2014 - 2020
United Kingdom		2017 - 2020
Other Non-U.S. Countries		2014 - 2020
United States (federal general)		2016 - 2020
United States (federal limited scope)		2012 - 2016
United States (state and local)		2006 - 2020

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