| Consolidated Statements of Operations [Abstract] | |
| Operating Revenues | |
| Operating Expenses | |
| Fuel, purchased power and gas | 3.3B |
| Operation and maintenance | 2.89B |
| Depreciation, depletion and amortization | 995M |
| Taxes other than income | 332M |
| Asset (gains) and losses, reserves and impairments, net | -3M |
| Total operating expenses | 7.51B |
| Operating Income | 1.28B |
| Other (Income) and Deductions | |
| Interest expense | 440M |
| Interest income | -10M |
| Other income | |
| Other expenses | 62M |
| Total Other (Income) and Deductions | 319M |
| Income Before Income Taxes | 960M |
| Income Tax Provision (Benefit) | 286M |
| Net Income | 618M |
| Less: Net Income (Loss) Attributable to Noncontrolling Interests | 8M |
| Net Income Attributable to DTE Energy Company | 610M |
| Basic Earnings per Common Share | |
| Net Income Attributable to DTE Energy Company | 3.56 |
| Diluted Earnings per Common Share | |
| Net Income Attributable to DTE Energy Company | 3.55 |
| Weighted Average Common Shares Outstanding | |
| Basic | 171M |
| Diluted | 172M |
| Dividends Declared per Common Share | 2.42 |