Short-Term Credit Arrangements and Borrowings (Tables)

12 Months Ended

Dec. 31, 2021

Short-term Debt [Abstract]

Schedule of Line of Credit Facilities

The availability under the facilities in place at December 31, 2021 is shown in the following table:

	DTE Energy		DTE Electric		DTE Gas		Total
	(In millions)
Unsecured revolving credit facility, expiring April 2025(a)	$	1,500	$	500	$	300	$	2,300
Unsecured term loan, expiring June 2022	400		—		—		400
Unsecured Canadian revolving credit facility, expiring May 2023	87		—		—		87
Unsecured letter of credit facility, expiring February 2023	150		—		—		150
Unsecured letter of credit facility, expiring July 2023	70		—		—		70
Unsecured letter of credit facility(b)	50		—		—		50
	2,257		500		300		3,057
Amounts outstanding at December 31, 2021
Revolver borrowings	75		—		—		75
Commercial paper issuances	320		153		210		683
Letters of credit	258		—		—		258
	653		153		210		1,016
Net availability at December 31, 2021	$	1,604	$	347	$	90	$	2,041

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(a)Total availability of $102 million expires in April 2024, including $67 million at DTE Energy, $22 million at DTE Electric, and $13 million at DTE Gas. All other availability expires in April 2025.

(b)Uncommitted letter of credit facility with automatic renewal provision for each July and therefore no expiration.