Disclosures About Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Sep. 30, 2011

Disclosures About Derivative Instruments and Hedging Activities [Abstract]

Outstanding derivative commodity instruments volumes

	Volumes
Commodity	2011		2010
LPG (millions of gallons)		138.0		160.0
Natural gas (millions of dekatherms, net)		26.1		36.3
Electricity calls (millions of kilowatt hours)		1,219.8		1,203.8
Electricity puts (millions of kilowatt hours)		204.9		—

Balance sheet location and fair value of derivative assets and liabilities

	Derivative Assets					Derivative Liabilities
		Fair Value					Fair Value
	Balance Sheet	September 30,				Balance Sheet	September 30,
	Location	2011		2010		Location	2011			2010
Derivatives Designated as Hedging Instruments:
Commodity contracts	Derivative financial instruments					Derivative financial instruments
	and Other assets	$	1.1	$	9.2	and Other noncurrent liabilities	$	(32.5	)	$	(48.6	)
Foreign currency contracts	Derivative financial instruments					Derivative financial instruments
	and Other assets		5.2		0.8	and Other noncurrent liabilities		—			(2.9	)
Interest rate contracts						Derivative financial instruments
						and Other noncurrent liabilities		(44.4	)		(18.5	)
Total Derivatives Designated as Hedging Instruments		$	6.3	$	10.0		$	(76.9	)	$	(70.0	)
Derivatives Accounted for Under ASC 980:
Commodity contracts	Derivative financial instruments	$	—	$	0.4	Derivative financial instruments and Other noncurrent liabilities	$	(11.7	)	$	(21.1	)
Derivatives Not Designated as Hedging Instruments:
Foreign currency contracts						Derivative financial instruments	$	(3.3	)	$	—
Commodity contracts	Derivative financial instruments
	and Other assets	$	5.8	$	2.2
Total Derivatives Not Designated as Hedging Instruments		$	5.8	$	2.2		$	(3.3	)	$	—
Total Derivatives		$	12.1	$	12.6		$	(91.9	)	$	(91.1	)

Effects of derivative instruments on the Condensed Consolidated Statements of Income and changes in AOCI and noncontrolling interest

	Gain or (Loss)									Gain or (Loss)									Location of
	Recognized in									Reclassified from									Gain or (Loss)
	AOCI and									AOCI and Noncontrolling									Reclassified from
	Noncontrolling Interests									Interests into Income									AOCI and Noncontrolling
	2011			2010			2009			2011			2010			2009			Interests into Income
Cash Flow Hedges:
Commodity contracts	$	2.2		$	(41.7	)	$	(241.1	)	$	(17.4	)	$	(21.0	)	$	(305.8	)	Cost of sales
Foreign currency contracts		6.9			3.2			(2.1	)		(0.8	)		0.7			5.0		Cost of sales
Interest rate contracts		(35.8	)		(12.6	)		(46.7	)		(14.1	)		(28.2	)		(7.0	)	Interest expense /other income
Total	$	(26.7	)	$	(51.1	)	$	(289.9	)	$	(32.3	)	$	(48.5	)	$	(307.8	)
Net Investment Hedges:
Foreign currency contracts	$	0.2		$	5.0		$	(2.0	)
Derivatives Not Designated as Hedging Instruments:

	Gain or (Loss)
	Recognized in Income								Location of Gain or (Loss)
	2011			2010		2009			Recognized in Income
Commodity contracts	$	2.1		$	1.3	$	(0.6	)	Cost of sales
Commodity contracts		0.3			0.2		0.7		Operating expenses / other income
Foreign currency contracts		(6.1	)		—		—		Other income
Total	$	(3.7	)	$	1.5	$	0.1