Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Jun. 30, 2020

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Notional Amounts Related to Open Derivative Contracts

The following table summarizes by derivative type the gross notional amounts related to open derivative contracts at June 30, 2020, September 30, 2019 and June 30, 2019, and the final settlement date of the Company's open derivative transactions as of June 30, 2020, excluding those derivatives that qualified for the NPNS exception:

			Notional Amounts (in millions)
Type	Units	Settlements Extending Through	June 30, 2020		September 30, 2019		June 30, 2019
Commodity Price Risk:
Regulated Utility Operations
Gas Utility NYMEX natural gas futures and option contracts	Dekatherms	June 2021	15.5		23.3		16.5
Non-utility Operations
LPG swaps	Gallons	September 2022	889.6		800.4		635.2
Natural gas futures, forward and pipeline contracts	Dekatherms	December 2024	180.8		196.1		191.4
Natural gas basis swap contracts	Dekatherms	December 2024	159.0		131.1		90.3
NYMEX natural gas storage futures contracts	Dekatherms	March 2021	2.5		0.3		1.7
NYMEX natural gas option contracts	Dekatherms	N/A	—		2.4		—
NYMEX propane storage futures contracts	Gallons	September 2020	0.9		0.5		0.5
Electricity long forward and futures contracts	Kilowatt hours	January 2024	4,549.5		3,098.1		3,140.0
Electricity short forward and futures contracts	Kilowatt hours	April 2024	405.5		366.7		589.3
Interest Rate Risk:
Interest rate swaps	Euro	October 2022	€	300.0	€	300.0	€	300.0
Interest rate swaps	USD	July 2024	$	1,347.4	$	1,357.3	$	114.1
Foreign Currency Exchange Rate Risk:
Forward foreign currency exchange contracts	USD	September 2023	$	439.5	$	516.0	$	436.7
Net investment hedge forward foreign exchange contracts	Euro	October 2024	€	172.8	€	172.8	€	172.8

Schedule of Derivative Assets, Liabilities and the Effects of Offsetting

The following table presents the Company’s derivative assets and liabilities by type, as well as the effects of offsetting:

	June 30, 2020		September 30, 2019		June 30, 2019
Derivative assets:
Derivatives designated as hedging instruments:
Foreign currency contracts	$	24.8	$	17.4	$	7.3
Derivatives subject to PGC and DS mechanisms:
Commodity contracts	2.6		1.4		1.0
Derivatives not designated as hedging instruments:
Commodity contracts	65.0		40.7		53.4
Foreign currency contracts	24.2		41.6		22.2
	89.2		82.3		75.6
Total derivative assets — gross	116.6		101.1		83.9
Gross amounts offset in the balance sheet	(42.4)		(29.0)		(25.5)
Total derivative assets — net	$	74.2	$	72.1	$	58.4
Derivative liabilities:
Derivatives designated as hedging instruments:
Interest rate contracts	$	(59.0)	$	(12.3)	$	(7.8)
Derivatives subject to PGC and DS mechanisms:
Commodity contracts	(1.6)		(3.7)		(3.1)
Derivatives not designated as hedging instruments:
Commodity contracts	(170.3)		(171.3)		(104.1)
Foreign currency contracts	(7.0)		(4.3)		(5.2)
	(177.3)		(175.6)		(109.3)
Total derivative liabilities — gross	(237.9)		(191.6)		(120.2)
Gross amounts offset in the balance sheet	42.4		29.0		25.5
Cash collateral pledged	20.7		29.3		2.3
Total derivative liabilities — net	$	(174.8)	$	(133.3)	$	(92.4)

Effects of Derivative Instruments on Condensed Consolidated Statements of Income and Changes in AOCI and Noncontrolling Interest

The following tables provide information on the effects of derivative instruments on the Condensed Consolidated Statements of Income and changes in AOCI for the three and nine months ended June 30, 2020 and 2019:

Three Months Ended June 30,:
	Gain (Loss) Recognized in AOCI				Gain (Loss) Reclassified from AOCI into Income				Location of Gain (Loss) Reclassified from AOCI into Income
Cash Flow Hedges:	2020		2019		2020		2019
Foreign currency contracts	$	—	$	—	$	—	$	0.2	Cost of sales
Interest rate contracts	(10.7)		(2.2)		(6.6)		(1.1)		Interest expense
Total	$	(10.7)	$	(2.2)	$	(6.6)	$	(0.9)
Net Investment Hedges:
Foreign currency contracts	$	(2.4)	$	0.4
	Gain (Loss) Recognized in Income
Derivatives Not Designated as Hedging Instruments:	2020		2019		Location of Gain (Loss) Recognized in Income
Commodity contracts	$	126.4	$	(58.6)	Cost of sales
Commodity contracts	6.0		7.2		Revenues
Commodity contracts	1.2		—		Operating and administrative expenses
Foreign currency contracts	(5.1)		0.4		Other non-operating (expense) income, net
Total	$	128.5	$	(51.0)
Nine Months Ended June 30,:
	Gain (Loss) Recognized in AOCI				Gain (Loss) Reclassified from AOCI into Income				Location of Gain (Loss) Reclassified from AOCI into Income
Cash Flow Hedges:	2020		2019		2020		2019
Foreign currency contracts	$	—	$	1.2	$	—	$	2.3	Cost of sales
Cross-currency contracts	—		(0.1)		—		(0.3)		Interest expense/other operating income, net
Interest rate contracts	(52.6)		(7.4)		(8.4)		(3.9)		Interest expense
Total	$	(52.6)	$	(6.3)	$	(8.4)	$	(1.9)
Net Investment Hedges:
Foreign currency contracts	$	7.4	$	7.2
	Gain (Loss) Recognized in Income
Derivatives Not Designated as Hedging Instruments:	2020		2019		Location of Gain (Loss) Recognized in Income
Commodity contracts	$	(112.2)	$	(244.5)	Cost of sales
Commodity contracts	14.1		9.0		Revenues
Commodity contracts	0.9		(0.3)		Operating and administrative expenses
Foreign currency contracts	(4.7)		17.1		Other non-operating (expense) income, net
Total	$	(101.9)	$	(218.7)