Short-Term Credit Arrangements and Borrowings (Tables)

9 Months Ended

Sep. 30, 2019

Short-term Debt [Abstract]

Schedule of Line of Credit Facilities

The availability under the facilities in place at September 30, 2019 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 revolving credit facility, expiring April 2024	1,500		500		300		2,300
	1,760		500		300		2,560
Amounts outstanding at September 30, 2019
Commercial paper issuances	110		382		232		724
Letters of credit	191		—		—		191
	301		382		232		915
Net availability at September 30, 2019	$	1,459	$	118	$	68	$	1,645