Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Significant Accounting Policies [Line Items]
Specific review of probable future collections based on receivable balances in excess of 90 days	30 days
Unbilled revenues	$ 1,642,000,000	$ 1,789,000,000
Intangible assets	33,000,000	27,000,000	$ 29,000,000
Excise and sales taxes net impact on statement of operations	0
Charitable contributions	0	22,000,000	$ 43,000,000
Natural gas inventory
Significant Accounting Policies [Line Items]
LIFO inventory amount	40,000,000	48,000,000
Excess of replacement costs over stated LIFO value	$ 49,000,000	113,000,000
Minimum
Significant Accounting Policies [Line Items]
Notes receivable considered delinquent period	60 days
Maximum
Significant Accounting Policies [Line Items]
Notes receivable considered delinquent period	120 days
DTE Electric and DTE Gas
Significant Accounting Policies [Line Items]
Receivables due date	21 days
Threshold period past due for write-off of trade accounts receivable	150 days
DTE Electric
Significant Accounting Policies [Line Items]
Unbilled revenues	$ 729,000,000	750,000,000
Unbilled revenues
Significant Accounting Policies [Line Items]
Unbilled revenues	900,000,000	1,000,000,000.0
Unbilled revenues | DTE Electric
Significant Accounting Policies [Line Items]
Unbilled revenues	$ 263,000,000	$ 264,000,000