Cover Page - USD ($)

12 Months Ended

Dec. 31, 2023

Feb. 20, 2024

Jun. 30, 2023

Cover [Abstract]

Document Type

10-K

Document Annual Report

true

Document Period End Date

Dec. 31, 2023

Current Fiscal Year End Date

--12-31

Entity File Number

001-08246

Entity Registrant Name

Southwestern Energy Company

Amendment Flag

false

Document Fiscal Year Focus

2023

Document Fiscal Period Focus

FY

Entity Central Index Key

0000007332

Entity Incorporation, State or Country Code

DE

Entity Tax Identification Number

71-0205415

Entity Address, Address Line One

10000 Energy Drive

Entity Address, City or Town

Spring

Entity Address, State or Province

TX

Entity Address, Postal Zip Code

77389

City Area Code

832

Local Phone Number

796-1000

Title of 12(b) Security

Common Stock, Par Value $0.01

Trading Symbol

SWN

Security Exchange Name

NYSE

Entity Well-known Seasoned Issuer

Yes

Entity Voluntary Filers

No

Entity Current Reporting Status

Yes

Entity Interactive Data Current

Yes

Entity Filer Category

Large Accelerated Filer

Entity Small Business

false

Entity Emerging Growth Company

false

ICFR Auditor Attestation Flag

true

Document Financial Statement Error Correction

false

Entity Shell Company

false

Entity Public Float

$ 6,577,423,795

Entity Common Stock, Shares Outstanding

1,101,463,052

Documents Incorporated by Reference

None.

Document Transition Report

false