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Financial and Other Derivative Instruments (Tables)
 12 Months Ended
Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Fair Value of Derivative Instruments
The following table presents the fair value of derivative instruments as of December 31, 2016 and 2015 for DTE Energy:
 
December 31, 2016
 
December 31, 2015
 
Derivative
Assets
 
Derivative
Liabilities
 
Derivative
Assets
 
Derivative
Liabilities
 
(In millions)
Derivatives not designated as hedging instruments:
 
 
 
 
 
 
 
Commodity Contracts:
 
 
 
 
 

 
 

Natural Gas
$
348

 
$
(461
)
 
$
387

 
$
(383
)
Electricity
193

 
(189
)
 
307

 
(305
)
Other
2

 
(3
)
 
5

 
(10
)
Foreign currency exchange contracts
6

 
(3
)
 
12

 
(7
)
Total derivatives not designated as hedging instruments
$
549

 
$
(656
)
 
$
711

 
$
(705
)
 
 
 
 
 
 
 
 
Current
$
447

 
$
(493
)
 
$
570

 
$
(521
)
Noncurrent
102

 
(163
)
 
141

 
(184
)
Total derivatives
$
549

 
$
(656
)
 
$
711

 
$
(705
)

The following table presents the fair value of derivative instruments as of December 31, 2016 and 2015 for DTE Electric:
 
December 31,
 
2016
 
2015
 
(In millions)
FTRs — Other current assets
$
2

 
$
3

Total derivatives not designated as hedging instruments
$
2

 
$
3
Offsetting Assets
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy at December 31, 2016 and 2015:
 
December 31, 2016
 
December 31, 2015
 
Gross Amounts of Recognized Assets (Liabilities)
 
Gross Amounts Offset in the Consolidated Statements of Financial Position
 
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position
 
Gross Amounts of Recognized Assets (Liabilities)
 
Gross Amounts Offset in the Consolidated Statements of Financial Position
 
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position
 
(In millions)
Derivative assets:
 
 
 
 
 
 
 
 
 
 
 
Commodity Contracts:
 
 
 
 
 
 
 
 
 
 
 
Natural Gas
$
348

 
$
(306
)
 
$
42

 
$
387

 
$
(285
)
 
$
102

Electricity
193

 
(157
)
 
36

 
307

 
(232
)
 
75

Other
2

 
—

 
2

 
5

 
(2
)
 
3

Foreign currency exchange contracts
6

 
(5
)
 
1

 
12

 
(9
)
 
3

Total derivative assets
$
549

 
$
(468
)
 
$
81

 
$
711

 
$
(528
)
 
$
183

 
 
 
 
 
 
 
 
 
 
 
 
Derivative liabilities:
 
 
 
 
 
 
 
 
 
 
 
Commodity Contracts:
 
 
 
 
 
 
 
 
 
 
 
Natural Gas
$
(461
)
 
$
321

 
$
(140
)
 
$
(383
)
 
$
294

 
$
(89
)
Electricity
(189
)
 
163

 
(26
)
 
(305
)
 
253

 
(52
)
Other
(3
)
 
2

 
(1
)
 
(10
)
 
8

 
(2
)
Foreign currency exchange contracts
(3
)
 
3

 
—

 
(7
)
 
7

 
—

Total derivative liabilities
$
(656
)
 
$
489

 
$
(167
)
 
$
(705
)
 
$
562

 
$
(143
)
Offsetting Liabilities
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy at December 31, 2016 and 2015:
 
December 31, 2016
 
December 31, 2015
 
Gross Amounts of Recognized Assets (Liabilities)
 
Gross Amounts Offset in the Consolidated Statements of Financial Position
 
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position
 
Gross Amounts of Recognized Assets (Liabilities)
 
Gross Amounts Offset in the Consolidated Statements of Financial Position
 
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position
 
(In millions)
Derivative assets:
 
 
 
 
 
 
 
 
 
 
 
Commodity Contracts:
 
 
 
 
 
 
 
 
 
 
 
Natural Gas
$
348

 
$
(306
)
 
$
42

 
$
387

 
$
(285
)
 
$
102

Electricity
193

 
(157
)
 
36

 
307

 
(232
)
 
75

Other
2

 
—

 
2

 
5

 
(2
)
 
3

Foreign currency exchange contracts
6

 
(5
)
 
1

 
12

 
(9
)
 
3

Total derivative assets
$
549

 
$
(468
)
 
$
81

 
$
711

 
$
(528
)
 
$
183

 
 
 
 
 
 
 
 
 
 
 
 
Derivative liabilities:
 
 
 
 
 
 
 
 
 
 
 
Commodity Contracts:
 
 
 
 
 
 
 
 
 
 
 
Natural Gas
$
(461
)
 
$
321

 
$
(140
)
 
$
(383
)
 
$
294

 
$
(89
)
Electricity
(189
)
 
163

 
(26
)
 
(305
)
 
253

 
(52
)
Other
(3
)
 
2

 
(1
)
 
(10
)
 
8

 
(2
)
Foreign currency exchange contracts
(3
)
 
3

 
—

 
(7
)
 
7

 
—

Total derivative liabilities
$
(656
)
 
$
489

 
$
(167
)
 
$
(705
)
 
$
562

 
$
(143
)
Netting Offsets of Derivative Assets and Liabilities Reconciliation to the Statements of Financial Position
The following table presents the netting offsets of Derivative assets and liabilities showing the reconciliation of derivative instruments to DTE Energy's Consolidated Statements of Financial Position at December 31, 2016 and 2015:
 
December 31, 2016
 
December 31, 2015
 
Derivative Assets
 
Derivative Liabilities
 
Derivative Assets
 
Derivative Liabilities
 
Current
 
Noncurrent
 
Current
 
Noncurrent
 
Current
 
Noncurrent
 
Current
 
Noncurrent
 
(In millions)
Total fair value of derivatives
$
447

 
$
102

 
$
(493
)
 
$
(163
)
 
$
570

 
$
141

 
$
(521
)
 
$
(184
)
Counterparty netting
(396
)
 
(65
)
 
396

 
65

 
(441
)
 
(85
)
 
441

 
85

Collateral adjustment
(4
)
 
(3
)
 
28

 
—

 
—

 
(2
)
 
23

 
13

Total derivatives as reported
$
47

 
$
34

 
$
(69
)
 
$
(98
)
 
$
129

 
$
54

 
$
(57
)
 
$
(86
)
Gain (Loss) Recognized in Income on Derivatives
The effect of derivatives not designated as hedging instruments on DTE Energy's Consolidated Statements of Operations for years ended December 31, 2016 and 2015 is as follows:
 
 
Location of Gain
(Loss) Recognized
in Income on Derivatives
 
Gain (Loss) Recognized in
Income on Derivatives for
Years Ended December 31,
Derivatives not Designated as Hedging Instruments
 
 
2016
 
2015
 
 
 
 
(In millions)
Commodity Contracts:
 
 
 
 
 
 
Natural Gas
 
Operating Revenues — Non-utility operations
 
$
(153
)
 
$
(34
)
Natural Gas
 
Fuel, purchased power, and gas — non-utility
 
(2
)
 
(44
)
Electricity
 
Operating Revenues — Non-utility operations
 
43

 
54

Other
 
Operating Revenues — Non-utility operations
 
5

 
(7
)
Foreign currency exchange contracts
 
Operating Revenues — Non-utility operations
 
(2
)
 
3

Total
 
 
 
$
(109
)
 
$
(28
)
Volume of Commodity Contracts
The following represents the cumulative gross volume of DTE Energy's derivative contracts outstanding as of December 31, 2016:
Commodity
 
Number of Units
Natural Gas (MMBtu)
 
1,753,295,124

Electricity (MWh)
 
30,831,794

Oil (Gallons)
 
14,112,000

Foreign Currency Exchange (Canadian dollars)
 
79,565,807