Income Taxes (Tables)

12 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

Income Before Income Taxes

Income before income taxes comprises the following:

	2017		2016		2015
Domestic	$	527.3	$	518.9	$	552.3
Foreign	174.1		191.1		39.5
Total income before income taxes	$	701.4	$	710.0	$	591.8

Provisions for Income Taxes

The provisions for income taxes consist of the following:

	2017			2016			2015
Current expense (benefit):
Federal	$	(2.7	)	$	44.2		$	97.1
State	14.0			20.9			32.2
Foreign	56.2			78.7			36.0
Investment tax credit	—			—			(1.2		)
Total current expense	67.5			143.8			164.1
Deferred expense (benefit):
Federal	125.8			81.2			28.1
State	16.4			1.3			2.9
Foreign	(31.8		)	(4.8		)	(17.0		)
Investment tax credit amortization	(0.3		)	(0.3		)	(0.3		)
Total deferred expense	110.1			77.4			13.7
Total income tax expense	$	177.6		$	221.2		$	177.8

Reconciliation of U.S. Federal Statutory Tax Rate to Effective Tax Rate

A reconciliation from the U.S. federal statutory tax rate to our effective tax rate is as follows:

	2017		2016		2015
U.S. federal statutory tax rate	35.0	%	35.0	%	35.0	%
Difference in tax rate due to:
Noncontrolling interests not subject to tax	(4.3	)	(6.2	)	(7.9	)
State income taxes, net of federal benefit	2.9		3.0		3.3
Valuation allowance adjustments	(1.1	)	(0.9	)	0.8
Effects of foreign operations	(1.1	)	0.6		0.2
Deferred tax effects of French tax rate change	(4.1	)	—		—
Excess tax benefits on share-based payments	(1.3	)	—		—
Other, net	(0.7	)	(0.3	)	(1.4	)
Effective tax rate	25.3	%	31.2	%	30.0	%

Deferred Tax Liabilities (Assets)

Deferred tax liabilities (assets) comprise the following at September 30:

	2017			2016
Excess book basis over tax basis of property, plant and equipment	$	975.8		$	873.9
Investment in AmeriGas Partners	326.8			323.2
Intangible assets and goodwill	98.2			87.1
Utility regulatory assets	132.2			148.3
Other	11.7			11.9
Gross deferred tax liabilities	1,544.7			1,444.4
Pension plan liabilities	(57.7		)	(79.7		)
Employee-related benefits	(65.4		)	(63.1		)
Operating loss carryforwards	(30.9		)	(31.5		)
Foreign tax credit carryforwards	(106.1		)	(105.1		)
Utility regulatory liabilities	(9.3		)	(13.9		)
Derivative instruments	(1.7		)	(14.7		)
Utility environmental liabilities	(22.2		)	(22.8		)
Other	(27.8		)	(28.3		)
Gross deferred tax assets	(321.1		)	(359.1		)
Deferred tax assets valuation allowance	107.1			114.3
Net deferred tax liabilities	$	1,330.7		$	1,199.6

Reconciliation of Unrecognized Tax Benefits

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

	2017			2016			2015
Unrecognized tax benefits — beginning of year	$	7.2		$	3.2		$	2.4
Additions for tax positions of the current year	1.9			2.2			0.9
Additions for tax positions taken in prior years	4.6			2.3			0.5
Settlements with tax authorities/statute lapses	(1.5		)	(0.5		)	(0.6		)
Unrecognized tax benefits — end of year	$	12.2		$	7.2		$	3.2