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Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Feb. 09, 2024
Jun. 30, 2023
Cover [Abstract]      
Entity Registrant Name TARGA RESOURCES CORP.    
Trading Symbol TRGP    
Entity Central Index Key 0001389170    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   223,155,363  
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2023    
Entity Small Business false    
Entity Shell Company false    
Entity Emerging Growth Company false    
Entity Current Reporting Status Yes    
Entity Tax Identification Number 20-3701075    
Entity File Number 001-34991    
Entity Address, Address Line One 811 Louisiana Street    
Entity Address, Address Line Two Suite 2100    
Entity Address, City or Town Houston    
Entity Address, State or Province TX    
Entity Address, Postal Zip Code 77002    
City Area Code 713    
Local Phone Number 584-1000    
Entity Interactive Data Current Yes    
Title of 12(b) Security Common Stock    
Security Exchange Name NYSE    
Entity Incorporation, State or Country Code DE    
Document Annual Report true    
Document Transition Report false    
Entity Well-known Seasoned Issuer Yes    
Entity Public Float     $ 16,811.5
Entity Voluntary Filers No    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Auditor Firm ID 238    
Auditor Name PricewaterhouseCoopers LLP    
Auditor Location Houston, Texas    
Documents Incorporated by Reference

DOCUMENTS INCORPORATED BY REFERENCE

 

Portions of the registrant’s definitive proxy statement for the 2024 Annual Meeting of Stockholders, to be filed no later than 120 days after the end of the fiscal year to which this Annual Report on Form 10-K relates, are incorporated by reference into Part III of this Annual Report on Form 10-K.