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Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Cash Flows from Operating Activities |  |  |
Net income | $ 454 | $ 384 | $ 417
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Depreciation and amortization | 628 | 598 | 546
Deferred income taxes and investment tax credit | 268 | 227 | 167
Postretirement benefits expense | 144 | 187 | 161
Bad debt expense | 67 | 57 | 74
Other non-cash operating activities | 22 | 16 | 33
Postretirement benefits contributions | (229) | (72) | (323)
Proceeds from government grant | 69 |  |
Cash provided by (used in) changes in assets and liabilities |  |  |
Decrease (increase) in accounts receivable, notes receivable, and accrued revenue | (120) | (147) | 119
Decrease (increase) in inventories | 202 | 104 | (14)
Increase (decrease) in accounts payable | 6 | (5) | 30
Increase (decrease) in accrued expenses | 16 | (38) | (34)
Other current and non-current assets and liabilities | (106) | (70) | (7)
Net cash provided by operating activities | 1,421 | 1,241 | 1,169
Cash Flows from Investing Activities |  |  |
Capital expenditures (excludes assets placed under capital lease) | (1,325) | (1,227) | (882)
Cost to retire property | (56) | (49) | (54)
Increase in EnerBank loans receivable | (139) | (63) | (100)
Other investing activities | (12) | (11) | (22)
Net cash used in investing activities | (1,532) | (1,350) | (1,058)
Cash Flows from Financing Activities |  |  |
Proceeds from issuance of long-term debt | 1,025 | 1,650 | 375
Proceeds from (retirements of) EnerBank notes, net | 125 | 65 | 98
Issuance of common stock | 36 | 30 | 29
Retirement of long-term debt | (741) | (1,527) | (413)
Payment of DOE liability |  |  | (43)
Payment of common and preferred stock dividends | 273 | 252 | 211
Redemption of preferred stock | (7) |  |
Payment of capital lease obligations and other financing costs | (35) | (35) | (34)
Increase (decrease) in notes payable | 60 | 110 |
Net cash provided by (used in) financing activities | 190 | 41 | (199)
Net Increase (Decrease) in Cash and Cash Equivalents, Including Assets Held for Sale | 79 | (68) | (88)
Decrease (Increase) in Cash and Cash Equivalents Included in Assets Held for Sale |  |  | 2
Net Increase (Decrease) in Cash and Cash Equivalents | 79 | (68) | (86)
Cash and Cash Equivalents, Beginning of Period | 93 | 161 | 247
Cash and Cash Equivalents, End of Period | 172 | 93 | 161
Cash transactions |  |  |
Interest paid (net of amounts capitalized) | 382 | 377 | 397
Income taxes paid | 34 | 19 | 27
Non-Cash Transactions |  |  |
Capital expenditures not paid | 176 | 110 | 92
Other assets placed under capital lease | 6 | 9 | 4
Consumers Energy Company [Member] |  |  |
Cash Flows from Operating Activities |  |  |
Net income | 534 | 439 | 467
Adjustments to reconcile net income to net cash provided by operating activities |  |  |
Depreciation and amortization | 622 | 592 | 542
Deferred income taxes and investment tax credit | 164 | 150 | 161
Postretirement benefits expense | 142 | 184 | 158
Bad debt expense | 63 | 53 | 70
Other non-cash operating activities | 12 | 14 | 16
Postretirement benefits contributions | (222) | (68) | (315)
Proceeds from government grant | 69 |  |
Cash provided by (used in) changes in assets and liabilities |  |  |
Decrease (increase) in accounts receivable, notes receivable, and accrued revenue | (116) | (145) | 112
Decrease (increase) in inventories | 205 | 107 | (17)
Increase (decrease) in accounts payable | 14 | 7 | 43
Increase (decrease) in accrued expenses | (27) | 51 | 74
Other current and non-current assets and liabilities | (109) | (31) | 12
Net cash provided by operating activities | 1,351 | 1,353 | 1,323
Cash Flows from Investing Activities |  |  |
Capital expenditures (excludes assets placed under capital lease) | (1,320) | (1,222) | (876)
Cost to retire property | (56) | (49) | (56)
Other investing activities | (11) | (8) | (19)
Net cash used in investing activities | (1,387) | (1,279) | (951)
Cash Flows from Financing Activities |  |  |
Proceeds from issuance of long-term debt | 750 | 1,075 |
Retirement of long-term debt | (466) | (1,064) | (37)
Payment of DOE liability |  |  | (43)
Payment of common and preferred stock dividends | 408 | 395 | 376
Redemption of preferred stock | (7) |  |
Stockholder contribution | 150 | 150 | 125
Payment of capital lease obligations and other financing costs | (30) | (30) | (27)
Increase (decrease) in notes payable | 60 | 110 |
Net cash provided by (used in) financing activities | 49 | (154) | (358)
Net Increase (Decrease) in Cash and Cash Equivalents | 13 | (80) | 14
Cash and Cash Equivalents, Beginning of Period | 5 | 85 | 71
Cash and Cash Equivalents, End of Period | 18 | 5 | 85
Cash transactions |  |  |
Interest paid (net of amounts capitalized) | 236 | 224 | 253
Income taxes paid | 225 | 63 | 8
Non-Cash Transactions |  |  |
Capital expenditures not paid | 176 | 110 | 92
Other assets placed under capital lease | $ 6 | $ 9 | $ 4

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- Definition Cash outflow in the form of ordinary dividends to common shareholders, preferred shareholders and noncontrolling interests, generally out of earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The amount of cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its non-pension postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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- Definition The cash inflow associated with the amount received by a corporation from a shareholder during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
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- Definition Amount of cash inflow (outflow) from long-term debt supported by a written promise to pay an obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591552-111686 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=31814832&loc=SL4591551-111686 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow attributable to repayments of borrowings not otherwise defined in the taxonomy (with maturities initially due after one year or beyond the operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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