Income Taxes (Tables)

12 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

Schedule of Components of Income before Income Taxes

The significant components of income before income taxes and the consolidated income tax provision were as follows:

	Year Ended September 30
	2017		2016		2015
Income before income taxes:
Domestic	$	129.0	$	92.2	$	49.2
Foreign	54.0		46.1		15.9
Total	$	183.0	$	138.3	$	65.1

Schedule of Income Tax Expense

Income tax expense:
Current provision
Federal	$	61.6		$	4.7		$	35.3
State	8.6			2.2			3.6
Foreign	13.3			9.1			1.7
Total current provision	83.5			16.0			40.6
Deferred provision:
Federal	(34.9		)	21.8			(18.1		)
State	1.3			1.2			(1.3		)
Foreign	0.8			(23.5		)	(2.9		)
Total deferred provision	(32.8		)	(0.5		)	(22.3		)
Income tax expense	$	50.7		$	15.5		$	18.3

Reconciliation of Income Tax Expense to Income Tax at Statutory Rate

Differences between income tax expense reported for financial reporting purposes and that computed based upon the application of the statutory U.S. Federal tax rate to the reported income before income taxes were as follows:

	Year Ended September 30
	2017					2016					2015
	Amount			% of Pretax Income		Amount			% of Pretax Income		Amount			% of Pretax Income
Federal income tax (a)	$	64.1		35.0	%	$	48.4		35.0	%	$	22.8		35.0	%
State income tax (b)	4.1			2.2	%	2.9			2.1	%	1.6			2.4	%
Foreign income tax (c)	(35.6		)	(19.4	)%	(14.0		)	(10.1	)%	(10.2		)	(15.7	)%
Application of federal research tax credits	(3.6		)	(2.0	)%	(5.6		)	(4.0	)%	(2.2		)	(3.4	)%
Application of foreign tax credits	(15.0		)	(8.2	)%	(0.5		)	(0.4	)%	(0.2		)	(0.3	)%
Adjustment of estimated income tax accruals	(0.8		)	(0.4	)%	0.3			0.2	%	(1.6		)	(2.4	)%
Valuation of tax attributes	36.3			19.8	%	(14.4		)	(10.4	)%	4.0			6.2	%
Foreign Inclusions	11.5			6.3	%	0.9			0.6	%	0.3			0.5	%
Domestic manufacturer's deduction	(4.4		)	(2.4	)%	(1.8		)	(1.3	)%	(1.5		)	(2.3	)%
Excess tax benefits from share based awards	(8.9		)	(4.9	)%	—			—	%	—			—	%
Capitalized transaction costs	—			—	%	—			—	%	2.5			3.8	%
Other, net	3.0			1.7	%	(0.7		)	(0.5	)%	2.8			4.3	%
Income tax expense	$	50.7		27.7	%	$	15.5		11.2	%	$	18.3		28.1	%

(a) At statutory rate.

(b) Net of Federal benefit.

(c) Federal tax rate differential.

Schedule of Deferred Taxes

The tax effect of temporary differences that gave rise to the deferred tax balance sheet accounts were as follows:

	Year Ended September 30
	2017			2016
Deferred tax assets:
Employee benefit accruals	$	64.5		$	76.5
Inventory	16.6			13.9
Net operating loss carryforwards	70.7			47.1
Tax credit carryforwards	23.3			14.2
Other, net	41.4			46.4
	216.5			198.1
Less: Valuation allowance	(58.2		)	(26.9		)
Total deferred tax assets	158.3			171.2
Deferred tax liabilities:
Depreciation	(28.6		)	(41.6		)
Amortization	(349.7		)	(371.2		)
Other, net	(5.3		)	(3.1		)
Total deferred tax liabilities	(383.6		)	(415.9		)
Deferred tax asset (liability) - net	$	(225.3	)	$	(244.7	)

Reconciliation of the Beginning and Ending Amount of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:

	Year Ended September 30
	2017			2016			2015
Balance at October 1	5.1			5.8			4.1
Increases in tax position of prior years	0.1			0.8			0.4
Decreases in tax position of prior years	—			(0.1		)	(1.3		)
Settlements with taxing authorities	—			(0.3		)	(1.2		)
Lapse of applicable statute of limitations	(0.8		)	(0.5		)	(1.3		)
Change in positions due to acquisitions	—			(0.6		)	5.5
Foreign currency adjustments	0.1			—			(0.4		)
Total change	(0.6		)	(0.7		)	1.7
Balance at September 30	$	4.5		$	5.1		$	5.8