Short-Term Credit Arrangements and Borrowings (Tables)

3 Months Ended

Mar. 31, 2020

Short-term Debt [Abstract]

Schedule of Line of Credit Facilities

The availability under the facilities in place at March 31, 2020 is shown in the following table:

	DTE Energy		DTE Electric		DTE Gas		Total
	(In millions)
Unsecured letter of credit facility, expiring in February 2021	$	150	$	—	$	—	$	150
Unsecured letter of credit facility, expiring in August 2021	110		—		—		110
Unsecured term loan, expiring in March 2021	500		—		—		500
Unsecured revolving credit facility, expiring April 2024	1,500		500		300		2,300
	2,260		500		300		3,060
Amounts outstanding at March 31, 2020
Commercial paper issuances	107		71		3		181
Letters of credit	231		—		—		231
Unsecured term loan	500		—		—		500
Revolver borrowings	300		—		150		450
	1,138		71		153		1,362
Net availability at March 31, 2020	$	1,122	$	429	$	147	$	1,698