v3.25.2
Earnings per Common Share - Reconciliation of Net Income and Weighted Average Shares Outstanding Used in Computing Basic and Diluted Net Income Per Common Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Earnings Per Common Share [Line Items]        
Net income (loss) attributable to Targa Resources Corp. $ 629.1 $ 298.5 $ 899.6 $ 573.7
Less: Premium on repurchase of noncontrolling interests, net of tax 0.0   70.5 [1]  
Net income (loss) attributable to common shareholders 629.1 298.5 829.1 573.7
Less: Participating share-based earnings [2] 4.0 2.3 5.2 4.5
Net income (loss) allocated to common shareholders for basic earnings per share, Total $ 625.1 $ 296.2 $ 823.9 $ 569.2
Weighted average shares outstanding - basic 216.6 221.0 217.2 221.9
Weighted average shares outstanding - diluted (in shares) 217.3 221.9 218.0 222.9
Net income (loss) per common share - basic $ 2.88 $ 1.34 $ 3.79 $ 2.56
Net income (loss) per common share - diluted $ 2.87 $ 1.33 $ 3.78 $ 2.55
Unvested Restricted Stock Awards [Member]        
Earnings Per Common Share [Line Items]        
Dilutive effect of unvested restricted stock awards 0.7 0.9 0.8 1.0
[1] Represents premium paid on the Badlands Transaction. See Note 4 – Joint Ventures and Acquisitions.
[2] Represents the distributed and undistributed earnings of the Company attributable to the participating securities. The dilutive effect of the reallocation of participating securities to diluted net income attributable to common shareholders was immaterial.