Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues
Operating revenues	$ 244	$ 224	$ 484	$ 444
Operating Expenses
Operation and maintenance	52	60	106	118
Depreciation and amortization	53	44	103	87
Taxes other than income	9	6	21	15
Asset (gains) losses and impairments, net	0	(3)	0	(3)
Operating Income	130	117	254	227
Other (Income) and Deductions
Interest expense	39	35	79	73
Interest income	0	(1)	(1)	(1)
Earnings from equity method investees	(39)	(41)	(85)	(91)
Other (income) and expense	(3)	0	(3)	(1)
Income Before Income Taxes	133	124	264	247
Income Tax Expense	33	30	64	69
Net Income	100	94	200	178
Less: Net Income Attributable to Noncontrolling Interests	4	3	7	6
Net Income Attributable to DT Midstream	$ 96	$ 91	$ 193	$ 172
Basic Earnings per Common Share
Net Income Attributable to DT Midstream (in dollars per share)	$ 0.99	$ 0.93	$ 1.99	$ 1.77
Diluted Earnings per Common Share
Net Income Attributable to DT Midstream (in dollars per share)	$ 0.98	$ 0.93	$ 1.97	$ 1.76
Weighted Average Common Shares Outstanding
Basic (in shares)	97.1	96.9	97.1	96.9
Diluted (in shares)	97.9	97.4	97.8	97.4

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

Name:	us-gaap_DepreciationAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.