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Derivative Instruments and Hedging Activities (Tables)
 12 Months Ended
Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Notional Amounts Related to Open Derivative Contracts
The following table summarizes the gross notional amounts related to open derivative contracts at September 30, 2016 and 2015 and the final settlement date of the Company's open derivative transactions broken out by derivative type as of September 30, 2016, excluding those derivatives that qualified for the NPNS exception:
 
 
 
 
 
 
Notional Amounts
(in millions)
Type
 
Units
 
Settlements Extending Through
 
2016
 
2015
Commodity Price Risk:
 
 
 
 
 
 
 
 
Regulated Utility Operations
 
 
 
 
 
 
 
 
Gas Utility NYMEX natural gas futures and option contracts
 
Dekatherms
 
September 2017
 
18.4

 
18.9

Electric Utility forward electricity purchase contracts
 
Kilowatt hours
 
N/A
 
—

 
136.0

FTRs & NYISO capacity contracts
 
Kilowatt hours
 
May 2017
 
58.3

 
277.1

Non-utility operations
 
 
 
 
 
 
 
 
LPG swaps & options
 
Gallons
 
September 2019
 
396.9

 
516.3

Natural gas futures, forward and pipeline contracts
 
Dekatherms
 
December 2020
 
71.1

 
110.2

Natural gas basis swap contracts
 
Dekatherms
 
December 2020
 
118.3

 
75.7

NYMEX natural gas storage
 
Dekatherms
 
March 2017
 
1.9

 
1.9

NYMEX propane storage
 
Gallons
 
N/A
 
—

 
2.0

Electricity long forward and futures contracts
 
Kilowatt hours
 
January 2020
 
761.2

 
474.3

Electricity short forward and futures contracts
 
Kilowatt hours
 
January 2020
 
264.6

 
297.9

FTRs & NYISO capacity contracts
 
Kilowatt hours
 
N/A
 
—

 
82.0

Interest Rate Risk:
 
 
 
 
 
 
 
 
Interest rate swaps
 
Euro
 
October 2020
 
€
645.8

 
€
645.8

IRPAs
 
USD
 
N/A
 
$
—

 
$
250.0

Foreign Currency Exchange Rate Risk:
 
 
 
 
 
 
 
 
Forward foreign currency exchange contracts
 
USD
 
September 2019
 
$
314.3

 
$
227.9

Cross-currency swaps
 
USD
 
September 2018
 
$
59.1

 
$
59.1
Schedule of Derivative Assets, Liabilities and the Effects of Offsetting
The following table presents the Company’s derivative assets and liabilities, as well as the effects of offsetting, as of September 30, 2016 and 2015:

 
2016
 
2015
Derivative assets:
 
 
 
Derivatives designated as hedging instruments:
 
 
 
Foreign currency contracts
$
17.8

 
$
29.1

Cross-currency contracts
—

 
0.4

 
17.8

 
29.5

Derivatives subject to PGC and DS mechanisms:
 
 
 
Commodity contracts
4.5

 
1.3

Derivatives not designated as hedging instruments:
 
 
 
Commodity contracts
50.4

 
27.7

Total derivative assets - gross
72.7

 
58.5

Gross amounts offset in the balance sheet
(35.0
)
 
(18.9
)
Cash collateral received
(0.3
)
 
—

Total derivative assets - net
$
37.4

 
$
39.6

 
 
 
 
Derivative liabilities:
 
 
 
Derivatives designated as hedging instruments:
 
 
 
Foreign currency contracts
$
(2.4
)
 
$
(0.1
)
Cross-currency contracts
(0.5
)
 
—

Interest rate contracts
(3.9
)
 
(10.8
)
 
(6.8
)
 
(10.9
)
Derivatives subject to PGC and DS mechanisms:
 
 
 
Commodity contracts
(0.5
)
 
(5.6
)
Derivatives not designated as hedging instruments:
 
 
 
Commodity contracts
(98.1
)
 
(163.4
)
Total derivative liabilities - gross
(105.4
)
 
(179.9
)
Gross amounts offset in the balance sheet
35.0

 
18.9

Cash collateral pledged
—

 
8.0

Total derivative liabilities - net
$
(70.4
)
 
$
(153.0
)
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 Consolidated Statements of Income and changes in AOCI and noncontrolling interests for Fiscal 2016, Fiscal 2015 and Fiscal 2014:
 
Gain or (Loss)
Recognized in
AOCI and
Noncontrolling Interests
 
Gain or (Loss)
Reclassified from
AOCI and Noncontrolling
Interests into Income
 
Location of Gain or (Loss) Reclassified from
AOCI and Noncontrolling
Interests into Income
 
2016
 
2015
 
2014
 
2016
 
2015
 
2014
 
Cash Flow Hedges:
 
 
 
 
 
 
 
 
 
 
 
 
 
Commodity contracts
$
—

 
$
—

 
$
50.8

 
$
—

 
$
(2.2
)
 
$
67.0

 
Cost of sales
Foreign currency contracts
3.6

 
26.0

 
15.3

 
17.2

 
9.7

 
(3.7
)
 
Cost of sales
Cross-currency contracts
0.1

 
5.4

 
3.1

 
0.4

 
8.5

 
(0.1
)
 
Interest expense
Interest rate contracts
(32.5
)
 
(6.6
)
 
(3.1
)
 
(4.5
)
 
(20.4
)
 
(15.9
)
 
Interest expense /other operating income, net
Total
$
(28.8
)
 
$
24.8

 
$
66.1

 
$
13.1

 
$
(4.4
)
 
$
47.3

 
 

 
Gain or (Loss)
Recognized in Income
Location of
Gain or (Loss)
Recognized in Income
 
 
2016
 
2015
 
2014
Derivatives Not Designated as Hedging Instruments:
 
 
 
 
 
 
 
Commodity contracts
$
(65.0
)
 
$
(375.8
)
 
$
(36.3
)
Cost of sales
 
Commodity contracts
(2.2
)
 
0.3

 
—

Revenues
 
Commodity contracts
(0.1
)
 
(0.8
)
 
—

Operating and administrative expenses / other operating income, net
 
Total
$
(67.3
)
 
$
(376.3
)
 
$
(36.3
)