|
Fair Value Measurements (Tables)
|
9 Months Ended |
|
Sep. 30, 2012
|
| Assets And Liabilities Measured At Fair Value On A Recurring Basis |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
In Millions
|
|
September 30, 2012
|
Total
|
Level 1
|
Level 2
|
Level 3
|
|
CMS Energy, including Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Assets
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
$
|
60
|
|
$
|
60
|
|
$
|
-
|
|
$
|
-
|
|
Restricted cash equivalents
|
|
|
14
|
|
|
14
|
|
|
-
|
|
|
-
|
|
Nonqualified deferred compensation plan assets
|
|
|
5
|
|
|
5
|
|
|
-
|
|
|
-
|
|
SERP
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
|
1
|
|
|
1
|
|
|
-
|
|
|
-
|
|
Mutual funds
|
|
|
128
|
|
|
128
|
|
|
-
|
|
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
6
|
|
|
1
|
|
|
1
|
|
|
4
|
|
Total
|
|
$
|
214
|
|
$
|
209
|
|
$
|
1
|
|
$
|
4
|
|
Liabilities
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nonqualified deferred compensation plan liabilities
|
|
$
|
5
|
|
$
|
5
|
|
$
|
-
|
|
$
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
6
|
|
|
-
|
|
|
3
|
|
|
3
|
|
Total
|
|
$
|
11
|
|
$
|
5
|
|
$
|
3
|
|
$
|
3
|
|
Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Assets
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
$
|
17
|
|
$
|
17
|
|
$
|
-
|
|
$
|
-
|
|
Restricted cash equivalents
|
|
|
13
|
|
|
13
|
|
|
-
|
|
|
-
|
|
CMS Energy common stock
|
|
|
31
|
|
|
31
|
|
|
-
|
|
|
-
|
|
Nonqualified deferred compensation plan assets
|
|
|
3
|
|
|
3
|
|
|
-
|
|
|
-
|
|
SERP
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
|
1
|
|
|
1
|
|
|
-
|
|
|
-
|
|
Mutual funds
|
|
|
86
|
|
|
86
|
|
|
-
|
|
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
4
|
|
|
-
|
|
|
-
|
|
|
4
|
|
Total
|
|
$
|
155
|
|
$
|
151
|
|
$
|
-
|
|
$
|
4
|
|
Liabilities
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nonqualified deferred compensation plan liabilities
|
|
$
|
3
|
|
$
|
3
|
|
$
|
-
|
|
$
|
-
|
|
Total
|
|
$
|
3
|
|
$
|
3
|
|
$
|
-
|
|
$
|
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
In Millions
|
|
December 31, 2011
|
Total
|
Level 1
|
Level 2
|
Level 3
|
|
CMS Energy, including Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Assets
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
$
|
109
|
|
$
|
109
|
|
$
|
-
|
|
$
|
-
|
|
Restricted cash equivalents
|
|
|
15
|
|
|
15
|
|
|
-
|
|
|
-
|
|
Nonqualified deferred compensation plan assets
|
|
|
4
|
|
|
4
|
|
|
-
|
|
|
-
|
|
SERP
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
|
1
|
|
|
1
|
|
|
-
|
|
|
-
|
|
Mutual funds
|
|
|
113
|
|
|
113
|
|
|
-
|
|
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
3
|
|
|
1
|
|
|
-
|
|
|
2
|
|
Total
|
|
$
|
245
|
|
$
|
243
|
|
$
|
-
|
|
$
|
2
|
|
Liabilities
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nonqualified deferred compensation plan liabilities
|
|
$
|
4
|
|
$
|
4
|
|
$
|
-
|
|
$
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
7
|
|
|
-
|
|
|
3
|
|
|
4
|
|
Total
|
|
$
|
11
|
|
$
|
4
|
|
$
|
3
|
|
$
|
4
|
|
Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Assets
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
$
|
56
|
|
$
|
56
|
|
$
|
-
|
|
$
|
-
|
|
Restricted cash equivalents
|
|
|
14
|
|
|
14
|
|
|
-
|
|
|
-
|
|
CMS Energy common stock
|
|
|
35
|
|
|
35
|
|
|
-
|
|
|
-
|
|
Nonqualified deferred compensation plan assets
|
|
|
3
|
|
|
3
|
|
|
-
|
|
|
-
|
|
SERP
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
|
1
|
|
|
1
|
|
|
-
|
|
|
-
|
|
Mutual funds
|
|
|
74
|
|
|
74
|
|
|
-
|
|
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
2
|
|
|
-
|
|
|
-
|
|
|
2
|
|
Total
|
|
$
|
185
|
|
$
|
183
|
|
$
|
-
|
|
$
|
2
|
|
Liabilities
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nonqualified deferred compensation plan liabilities
|
|
$
|
3
|
|
$
|
3
|
|
$
|
-
|
|
$
|
-
|
|
Total
|
|
$
|
3
|
|
$
|
3
|
|
$
|
-
|
|
$
|
-
|
|
| Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Significant Level 3 Inputs |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
In Millions
|
|
|
Three Months Ended
|
|
Nine Months Ended
|
|
September 30
|
2012
|
2011
|
|
2012
|
2011
|
|
CMS Energy, including Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Balance at beginning of period
|
|
$
|
3
|
|
$
|
-
|
|
|
$
|
(2)
|
|
$
|
(3)
|
|
Total gains (losses) included in earnings1
|
|
|
(1)
|
|
|
(1)
|
|
|
|
1
|
|
|
(1)
|
|
Total gains (losses) offset through regulatory accounting
|
|
|
1
|
|
|
(1)
|
|
|
|
8
|
|
|
1
|
|
Purchases
|
|
|
-
|
|
|
-
|
|
|
|
-
|
|
|
1
|
|
Settlements
|
|
|
(2)
|
|
|
1
|
|
|
|
(6)
|
|
|
1
|
|
Balance at end of period
|
|
$
|
1
|
|
$
|
(1)
|
|
|
$
|
1
|
|
$
|
(1)
|
|
Unrealized gains (losses) included in earnings relating to
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
assets and liabilities still held at end of period1
|
|
$
|
(1)
|
|
$
|
(1)
|
|
|
$
|
1
|
|
$
|
-
|
|
Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Balance at beginning of period
|
|
$
|
5
|
|
$
|
3
|
|
|
$
|
2
|
|
$
|
1
|
|
Total gains (losses) offset through regulatory accounting
|
|
|
1
|
|
|
(1)
|
|
|
|
8
|
|
|
1
|
|
Purchases
|
|
|
-
|
|
|
-
|
|
|
|
-
|
|
|
1
|
|
Settlements
|
|
|
(2)
|
|
|
-
|
|
|
|
(6)
|
|
|
(1)
|
|
Balance at end of period
|
|
$
|
4
|
|
$
|
2
|
|
|
$
|
4
|
|
$
|
2
|
1 CMS Energy records realized and unrealized gains and losses for Level 3 recurring fair value measurements in earnings as a component of operating revenue or maintenance and other operating expenses on its consolidated statements of income.
|
|
Consumers Energy Company [Member]
|
|
| Assets And Liabilities Measured At Fair Value On A Recurring Basis |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
In Millions
|
|
September 30, 2012
|
Total
|
Level 1
|
Level 2
|
Level 3
|
|
CMS Energy, including Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Assets
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
$
|
60
|
|
$
|
60
|
|
$
|
-
|
|
$
|
-
|
|
Restricted cash equivalents
|
|
|
14
|
|
|
14
|
|
|
-
|
|
|
-
|
|
Nonqualified deferred compensation plan assets
|
|
|
5
|
|
|
5
|
|
|
-
|
|
|
-
|
|
SERP
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
|
1
|
|
|
1
|
|
|
-
|
|
|
-
|
|
Mutual funds
|
|
|
128
|
|
|
128
|
|
|
-
|
|
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
6
|
|
|
1
|
|
|
1
|
|
|
4
|
|
Total
|
|
$
|
214
|
|
$
|
209
|
|
$
|
1
|
|
$
|
4
|
|
Liabilities
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nonqualified deferred compensation plan liabilities
|
|
$
|
5
|
|
$
|
5
|
|
$
|
-
|
|
$
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
6
|
|
|
-
|
|
|
3
|
|
|
3
|
|
Total
|
|
$
|
11
|
|
$
|
5
|
|
$
|
3
|
|
$
|
3
|
|
Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Assets
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
$
|
17
|
|
$
|
17
|
|
$
|
-
|
|
$
|
-
|
|
Restricted cash equivalents
|
|
|
13
|
|
|
13
|
|
|
-
|
|
|
-
|
|
CMS Energy common stock
|
|
|
31
|
|
|
31
|
|
|
-
|
|
|
-
|
|
Nonqualified deferred compensation plan assets
|
|
|
3
|
|
|
3
|
|
|
-
|
|
|
-
|
|
SERP
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
|
1
|
|
|
1
|
|
|
-
|
|
|
-
|
|
Mutual funds
|
|
|
86
|
|
|
86
|
|
|
-
|
|
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
4
|
|
|
-
|
|
|
-
|
|
|
4
|
|
Total
|
|
$
|
155
|
|
$
|
151
|
|
$
|
-
|
|
$
|
4
|
|
Liabilities
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nonqualified deferred compensation plan liabilities
|
|
$
|
3
|
|
$
|
3
|
|
$
|
-
|
|
$
|
-
|
|
Total
|
|
$
|
3
|
|
$
|
3
|
|
$
|
-
|
|
$
|
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
In Millions
|
|
December 31, 2011
|
Total
|
Level 1
|
Level 2
|
Level 3
|
|
CMS Energy, including Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Assets
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
$
|
109
|
|
$
|
109
|
|
$
|
-
|
|
$
|
-
|
|
Restricted cash equivalents
|
|
|
15
|
|
|
15
|
|
|
-
|
|
|
-
|
|
Nonqualified deferred compensation plan assets
|
|
|
4
|
|
|
4
|
|
|
-
|
|
|
-
|
|
SERP
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
|
1
|
|
|
1
|
|
|
-
|
|
|
-
|
|
Mutual funds
|
|
|
113
|
|
|
113
|
|
|
-
|
|
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
3
|
|
|
1
|
|
|
-
|
|
|
2
|
|
Total
|
|
$
|
245
|
|
$
|
243
|
|
$
|
-
|
|
$
|
2
|
|
Liabilities
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nonqualified deferred compensation plan liabilities
|
|
$
|
4
|
|
$
|
4
|
|
$
|
-
|
|
$
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
7
|
|
|
-
|
|
|
3
|
|
|
4
|
|
Total
|
|
$
|
11
|
|
$
|
4
|
|
$
|
3
|
|
$
|
4
|
|
Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Assets
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
$
|
56
|
|
$
|
56
|
|
$
|
-
|
|
$
|
-
|
|
Restricted cash equivalents
|
|
|
14
|
|
|
14
|
|
|
-
|
|
|
-
|
|
CMS Energy common stock
|
|
|
35
|
|
|
35
|
|
|
-
|
|
|
-
|
|
Nonqualified deferred compensation plan assets
|
|
|
3
|
|
|
3
|
|
|
-
|
|
|
-
|
|
SERP
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Cash equivalents
|
|
|
1
|
|
|
1
|
|
|
-
|
|
|
-
|
|
Mutual funds
|
|
|
74
|
|
|
74
|
|
|
-
|
|
|
-
|
|
Derivative instruments
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Commodity contracts
|
|
|
2
|
|
|
-
|
|
|
-
|
|
|
2
|
|
Total
|
|
$
|
185
|
|
$
|
183
|
|
$
|
-
|
|
$
|
2
|
|
Liabilities
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Nonqualified deferred compensation plan liabilities
|
|
$
|
3
|
|
$
|
3
|
|
$
|
-
|
|
$
|
-
|
|
Total
|
|
$
|
3
|
|
$
|
3
|
|
$
|
-
|
|
$
|
-
|
|
| Assets And Liabilities Measured At Fair Value On A Recurring Basis Using Significant Level 3 Inputs |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
In Millions
|
|
|
Three Months Ended
|
|
Nine Months Ended
|
|
September 30
|
2012
|
2011
|
|
2012
|
2011
|
|
CMS Energy, including Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Balance at beginning of period
|
|
$
|
3
|
|
$
|
-
|
|
|
$
|
(2)
|
|
$
|
(3)
|
|
Total gains (losses) included in earnings1
|
|
|
(1)
|
|
|
(1)
|
|
|
|
1
|
|
|
(1)
|
|
Total gains (losses) offset through regulatory accounting
|
|
|
1
|
|
|
(1)
|
|
|
|
8
|
|
|
1
|
|
Purchases
|
|
|
-
|
|
|
-
|
|
|
|
-
|
|
|
1
|
|
Settlements
|
|
|
(2)
|
|
|
1
|
|
|
|
(6)
|
|
|
1
|
|
Balance at end of period
|
|
$
|
1
|
|
$
|
(1)
|
|
|
$
|
1
|
|
$
|
(1)
|
|
Unrealized gains (losses) included in earnings relating to
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
assets and liabilities still held at end of period1
|
|
$
|
(1)
|
|
$
|
(1)
|
|
|
$
|
1
|
|
$
|
-
|
|
Consumers
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Balance at beginning of period
|
|
$
|
5
|
|
$
|
3
|
|
|
$
|
2
|
|
$
|
1
|
|
Total gains (losses) offset through regulatory accounting
|
|
|
1
|
|
|
(1)
|
|
|
|
8
|
|
|
1
|
|
Purchases
|
|
|
-
|
|
|
-
|
|
|
|
-
|
|
|
1
|
|
Settlements
|
|
|
(2)
|
|
|
-
|
|
|
|
(6)
|
|
|
(1)
|
|
Balance at end of period
|
|
$
|
4
|
|
$
|
2
|
|
|
$
|
4
|
|
$
|
2
|
1 CMS Energy records realized and unrealized gains and losses for Level 3 recurring fair value measurements in earnings as a component of operating revenue or maintenance and other operating expenses on its consolidated statements of income.
|