Significant Accounting Policies (Details Textuals) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Significant Accounting Policies [Line Items]
Unbilled revenues	$ 1,695,000,000	$ 1,542,000,000
Specific review of probable future collections based on receivable balances, threshold duration	30 days
Intangible assets amortization expense	$ 16,000,000	16,000,000	$ 9,000,000
Capitalized cloud computing costs	16,000,000	0
Excise and sales taxes net impact on statement of operations	0
Charitable contributions	25,000,000	20,000,000	$ 0
Natural gas inventory
Significant Accounting Policies [Line Items]
LIFO inventory amount	50,000,000	40,000,000
Excess of replacement costs over stated LIFO value	136,000,000	62,000,000
Notes receivable
Significant Accounting Policies [Line Items]
Financing receivables	150,000,000
Past due
Significant Accounting Policies [Line Items]
Financing receivables	$ 0
Minimum | Notes receivable
Significant Accounting Policies [Line Items]
Number of dates after which receivable is considered delinquent	60 days
Maximum | Notes receivable
Significant Accounting Policies [Line Items]
Number of dates after which receivable is considered delinquent	120 days
DTE Electric and DTE Gas
Significant Accounting Policies [Line Items]
Threshold period past due for write-off of trade accounts receivable	150 days
DTE Electric and DTE Gas | Accounts Receivable
Significant Accounting Policies [Line Items]
Number of dates after which receivable is considered delinquent	21 days
DTE Electric
Significant Accounting Policies [Line Items]
Unbilled revenues	$ 694,000,000	763,000,000
Capitalized cloud computing costs	12,000,000	0
DTE Electric | Notes receivable
Significant Accounting Policies [Line Items]
Financing receivables	17,000,000
Unbilled revenues
Significant Accounting Policies [Line Items]
Unbilled revenues	1,000,000,000	800,000,000
Unbilled revenues | DTE Electric
Significant Accounting Policies [Line Items]
Unbilled revenues	$ 270,000,000	$ 260,000,000