Cover	12 Months Ended
Cover	Dec. 31, 2022
Document Information [Line Items]
Document Type	DEF 14A
Amendment Flag	false
Entity Information [Line Items]
Entity Registrant Name	ONE Gas, Inc.
Entity Central Index Key	0001587732

Pay vs Performance Disclosure - USD ($)

12 Months Ended

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Pay vs Performance Disclosure [Table]

Pay vs Performance [Table Text Block]

PAY VERSUS PERFORMANCE

Our CEO is the principal executive officer (“PEO”). As required by Section 953(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act, and Item 402(v) of Regulation

S-K,

we are providing the following information about the relationship between “compensation actually paid” to our CEO and to our other NEOS (i.e., the

non-PEO

NEOs) and ce

rtain

financial performance of the Company. Compensation actually paid, as determined under SEC requirements, does not reflect the actual amount of compensation earned by or paid to our executive officers during a covered year. For further information concerning the Company’s

pay-for-performance

philosophy and how the Company aligns executive compensation with the Company’s performance, refer to the Compensation Discussion and Analysis.

Pay versus Performance Table



	Summary Compensation Table Total for CEO (McAnnally)									Average Summary Comp Table Total for Other NEOs				Value of Initial Fixed $100 Investment Based On:						Company Selected Performance Measure: EPS (5)
Year (1)	Summary Compensation Table Total for CEO (McAnnally)		Compensation Actually Paid to CEO (McAnnally) (2)		Summary Comp Table Total for CEO (Norton)		Compensation Actually Paid to CEO (Norton) (2)			Average Summary Comp Table Total for Other NEOs		Average Compensation Actually Paid to Other NEOs (3)		ONE Gas Cumulative TSR		Benchmarking Peer Group Cumulative TSR (4)		Net Income ($Mn)		Company Selected Performance Measure: EPS (5)

2022		$3,474,198		$2,938,903		N/A		N/A			$1,323,263		$1,269,028		$88.46		$103.89		$221.74		$4.08

2021		$2,584,173		$2,286,142		$4,331,191		($1,331,503	)		$1,422,177		$1,081,408		$87.94		$98.68		$206.43		$3.85

2020		N/A		N/A		$5,388,789		$2,346,059			$1,828,178		$1,062,915		$84.27		$87.65		$196.41		$3.68

(1)	The CEO and other NEOs for the indicated years were as follows:

•

For 2022, our CEO was Robert S. McAnnally and our other NEOs were Caron A Lawhorn, Curtis L Dinan, Joseph L. McCormick and Mark A. Bender.

•

For 2021, our CEO was Robert S. McAnnally, our former CEO was Pierce H. Norton II, and our other NEOs were Caron A. Lawhorn, Curtis L. Dinan, Joseph L. McCormick and Mark A. Bender.

•

For 2020, our CEO was Pierce H. Norton II and our other NEOs were Caron A. Lawhorn, Curtis L. Dinan, Robert S. McAnnally and Joseph L. McCormick.

(2)	Amounts reported in this column are based on total compensation reported for our CEOs in the Summary Compensation Table for the indicated fiscal years and adjusted as shown in the table below.



	2022			2021			2021			2020

	Robert S. McAnnally			Robert S. McAnnally			Pierce H. Norton II			Pierce H. Norton II

Total Compensation for CEO as reported SCT for the covered year	$	3,474,198		$	2,584,173		$	4,331,191		$	5,388,789

Deduct pension values reported in SCT for the covered year	$	0		$	0		($	1,098,395	)	($	1,442,205	)

Deduct grant date fair value of equity awards reported in SCT for the covered year	($	2,152,533	)	($	1,537,575	)	($	2,437,725	)	($	2,109,106	)

Add pension value attributable to current year’s service and any change in pension value attributable to plan amendments made in the covered year	$	0		$	0		$	184,703		$	325,884

Add fair values as of the end of the covered year of all equity awards granted during the covered year that are outstanding and unvested as of the end of such covered year	$	1,908,607		$	1,517,985		$	152,342		$	1,850,433

Add fair value as of the vesting date of any awards granted in the covered year that vested during the covered year	$	0		$	0		$	52,405		$	0

Add dividends paid on unvested shares/share units and stock options	$	0		$	0		$	0		$	0

Add the change in fair value (whether positive or negative) as of the end of the covered year of any equity awards granted in any prior year that are outstanding and unvested as of the end of such covered year	($	334,960	)	($	195,658	)	($	1,897,221	)	($	1,114,737	)

Add the change in fair value (whether positive or negative) as of the vesting date of any equity awards granted in any prior year for which all applicable vesting conditions were satisfied during the covered year	$	43,590		($	82,783	)	($	369,701	)	($	552,999	)

Subtract the fair value of any equity awards granted in a prior year that were forfeited in the covered year determined as of the end of the prior year	$	0		$	0		($	249,101	)	$	0

Compensation Actually Paid to CEO	$ 2,938,903			$ 2,286,142			($ 1,331,503)			$ 2,346,059

Fair value of equity awards was computed in accordance with the Company’s methodology used for financial reporting purposes.

(3)	Amounts reported in this column are based on the average of the total compensation reported for our other NEOs in the Summa ry Compensation Table for the indicated fiscal years and adjusted as shown in the table below.



	2022			2021			2020

Average of the Total Compensation for the Other NEOs as reported SCT	$	1,323,263		$	1,422,177		$	1,828,178

Deduct pension values reported in SCT for the covered year	$	0		($	176,483	)	($	457,413	)

Deduct grant date fair value of equity awards reported in SCT for the covered year	($	597,911	)	($	540,767	)	($	573,146	)

Add pension value attributable to current year’s service and any change in pension value attributable to plan amendments made in the covered year	$	122,501		$	139,947		$	129,215

Add fair values as of the end of the covered year of all equity awards granted during the covered year that are outstanding and unvested as of the end of such covered year	$	530,153		$	516,179		$	524,921

Add fair value as of the vesting date of any awards granted in the covered year that vested during the covered year	$	0		$	0		$	0

Add dividends paid on unvested shares/share units and stock options	$	0		$	0		$	0

Add the change in fair value (whether positive or negative) as of the end of the covered year of any equity awards granted in any prior year that are outstanding and unvested as of the end of such covered year	($	149,362	)	($	202,781	)	($	252,802	)

Add the change in fair value (whether positive or negative) as of the vesting date of any equity awards granted in any prior year for which all applicable vesting conditions were satisfied during the covered year	$	40,384		($	76,864	)	($	136,038	)

Subtract the fair value of any equity awards granted in a prior year that were forfeited in the covered year determined as of the end of the prior year	$	0		$	0		$	0

Average of the Compensation Actually Paid to Other NEOs	$	1,269,028		$	1,081,408		$	1,062,915

Fair value of equity awards was computed in accordance with the Company’s methodology used for financial reporting purposes.

(4)	The companies that composed the benchmarking peer group for each covered fiscal year were as follows:

•

Alliant Energy Corporation (LNT)

•

Atmos Energy Corporation (ATO)

•

Avista Corporation (AVA)

•

IDACORP, Inc. (IDA)

•

New Jersey Resources (NJR)

•

Northwest Natural Holding Company (NWN)

•

NorthWestern Corporation (NWE)

•

Pinnacle West Capital Corporation (PNW)

•

PNM Resources, Inc. (PNM)

•

Portland General Electric Co. (POR)

•

South Jersey Industry (SJI)

•

Southwest Gas Holdings (SWX)

•

Spire (SR)

(5)

In accordance with SEC rules, the Company is required to include in the Pay versus Performance table the “most important” financial performance measure (as determined by the C

ompan

y) used to link compensation actually paid to our executive officer to company performance for the most recently completed fiscal year. The Company determined EPS, which is a metric included in our incentive program, meets this requirement and therefore, we h

ave

included this performance measure in the Pay versus Performance table.

Company Selected Measure Name

EPS

Named Executive Officers, Footnote [Text Block]

(1)	The CEO and other NEOs for the indicated years were as follows:

•

For 2022, our CEO was Robert S. McAnnally and our other NEOs were Caron A Lawhorn, Curtis L Dinan, Joseph L. McCormick and Mark A. Bender.

•

For 2021, our CEO was Robert S. McAnnally, our former CEO was Pierce H. Norton II, and our other NEOs were Caron A. Lawhorn, Curtis L. Dinan, Joseph L. McCormick and Mark A. Bender.

•

For 2020, our CEO was Pierce H. Norton II and our other NEOs were Caron A. Lawhorn, Curtis L. Dinan, Robert S. McAnnally and Joseph L. McCormick.

Peer Group Issuers, Footnote [Text Block]

(4)	The companies that composed the benchmarking peer group for each covered fiscal year were as follows:

•

Alliant Energy Corporation (LNT)

•

Atmos Energy Corporation (ATO)

•

Avista Corporation (AVA)

•

IDACORP, Inc. (IDA)

•

New Jersey Resources (NJR)

•

Northwest Natural Holding Company (NWN)

•

NorthWestern Corporation (NWE)

•

Pinnacle West Capital Corporation (PNW)

•

PNM Resources, Inc. (PNM)

•

Portland General Electric Co. (POR)

•

South Jersey Industry (SJI)

•

Southwest Gas Holdings (SWX)

•

Spire (SR)

Adjustment To PEO Compensation, Footnote [Text Block]

(2)	Amounts reported in this column are based on total compensation reported for our CEOs in the Summary Compensation Table for the indicated fiscal years and adjusted as shown in the table below.



	2022			2021			2021			2020

	Robert S. McAnnally			Robert S. McAnnally			Pierce H. Norton II			Pierce H. Norton II

Total Compensation for CEO as reported SCT for the covered year	$	3,474,198		$	2,584,173		$	4,331,191		$	5,388,789

Deduct pension values reported in SCT for the covered year	$	0		$	0		($	1,098,395	)	($	1,442,205	)

Deduct grant date fair value of equity awards reported in SCT for the covered year	($	2,152,533	)	($	1,537,575	)	($	2,437,725	)	($	2,109,106	)

Add pension value attributable to current year’s service and any change in pension value attributable to plan amendments made in the covered year	$	0		$	0		$	184,703		$	325,884

Add fair values as of the end of the covered year of all equity awards granted during the covered year that are outstanding and unvested as of the end of such covered year	$	1,908,607		$	1,517,985		$	152,342		$	1,850,433

Add fair value as of the vesting date of any awards granted in the covered year that vested during the covered year	$	0		$	0		$	52,405		$	0

Add dividends paid on unvested shares/share units and stock options	$	0		$	0		$	0		$	0

Add the change in fair value (whether positive or negative) as of the end of the covered year of any equity awards granted in any prior year that are outstanding and unvested as of the end of such covered year	($	334,960	)	($	195,658	)	($	1,897,221	)	($	1,114,737	)

Add the change in fair value (whether positive or negative) as of the vesting date of any equity awards granted in any prior year for which all applicable vesting conditions were satisfied during the covered year	$	43,590		($	82,783	)	($	369,701	)	($	552,999	)

Subtract the fair value of any equity awards granted in a prior year that were forfeited in the covered year determined as of the end of the prior year	$	0		$	0		($	249,101	)	$	0

Compensation Actually Paid to CEO	$ 2,938,903			$ 2,286,142			($ 1,331,503)			$ 2,346,059

Fair value of equity awards was computed in accordance with the Company’s methodology used for financial reporting purposes.

Non-PEO NEO Average Total Compensation Amount

$ 1,323,263

$ 1,422,177

$ 1,828,178

Non-PEO NEO Average Compensation Actually Paid Amount

$ 1,269,028

1,081,408

1,062,915

Adjustment to Non-PEO NEO Compensation Footnote [Text Block]

(3)	Amounts reported in this column are based on the average of the total compensation reported for our other NEOs in the Summa ry Compensation Table for the indicated fiscal years and adjusted as shown in the table below.



	2022			2021			2020

Average of the Total Compensation for the Other NEOs as reported SCT	$	1,323,263		$	1,422,177		$	1,828,178

Deduct pension values reported in SCT for the covered year	$	0		($	176,483	)	($	457,413	)

Deduct grant date fair value of equity awards reported in SCT for the covered year	($	597,911	)	($	540,767	)	($	573,146	)

Add pension value attributable to current year’s service and any change in pension value attributable to plan amendments made in the covered year	$	122,501		$	139,947		$	129,215

Add fair values as of the end of the covered year of all equity awards granted during the covered year that are outstanding and unvested as of the end of such covered year	$	530,153		$	516,179		$	524,921

Add fair value as of the vesting date of any awards granted in the covered year that vested during the covered year	$	0		$	0		$	0

Add dividends paid on unvested shares/share units and stock options	$	0		$	0		$	0

Add the change in fair value (whether positive or negative) as of the end of the covered year of any equity awards granted in any prior year that are outstanding and unvested as of the end of such covered year	($	149,362	)	($	202,781	)	($	252,802	)

Add the change in fair value (whether positive or negative) as of the vesting date of any equity awards granted in any prior year for which all applicable vesting conditions were satisfied during the covered year	$	40,384		($	76,864	)	($	136,038	)

Subtract the fair value of any equity awards granted in a prior year that were forfeited in the covered year determined as of the end of the prior year	$	0		$	0		$	0

Average of the Compensation Actually Paid to Other NEOs	$	1,269,028		$	1,081,408		$	1,062,915

Fair value of equity awards was computed in accordance with the Company’s methodology used for financial reporting purposes.

Compensation Actually Paid vs. Total Shareholder Return [Text Block]

The following graph compares the compensation actually paid to our CEO(s), the average of the comp

ensat

ion actually paid to our other NEOs and the Company’s TSR performance. The graph also compares the Company’s TSR performance with the benchmarking peer group’s TSR performance. The Company’s and the benchmarking peer group’s TSR amounts assume that $100 was invested beginning on December 31, 2019, and assumes reinvestment of all dividends.

Compensation Actually Paid vs. Net Income [Text Block]

The following graph compares the compensation actually paid to our CEO

(s) an

d the average of the compensation actually paid to our other NEOs with our net income.

Compensation Actually Paid vs. Company Selected Measure [Text Block]

The following graph compares the compensation actually paid to our CEO(s) and the average of the compensation actually paid to our other NEOs with our EPS.