v3.26.1
Debt Obligations - Summary Of Debt Obligations (Parenthetical) (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2026
Mar. 31, 2026
Mar. 31, 2026
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Jan. 15, 2026
Debt Instrument [Line Items]              
Proceeds from borrowings under accounts receivable securitization facility       $ 1,200,000,000 $ 870,000,000    
Partnership accounts receivable securitization facility, due August 2025 [1]       451,000,000   $ 0  
Senior Unsecured 6.150% Fixed Rate, due March 2029 [Member]              
Debt Instrument [Line Items]              
Interest rate on fixed rate debt   6.15% 6.15%     6.15%  
Accounts Receivable Securitization Facility [Member]              
Debt Instrument [Line Items]              
Borrowing capacity       600,000,000      
Proceeds from borrowings under accounts receivable securitization facility       451,000,000      
Partnership accounts receivable securitization facility, due August 2025       600,000,000      
Remaining liquidity needs       149,000,000      
Accounts Receivable Securitization Facility [Member] | Subsequent Event [Member]              
Debt Instrument [Line Items]              
Borrowing capacity $ 800,000,000            
Maturity date Jul. 30, 2027            
Revolving Credit Facility [Member] | TRGP Senior Revolving Credit Facility due February 2030 [Member]              
Debt Instrument [Line Items]              
Maturity date     Feb. 28, 2027     Feb. 28, 2027  
Borrowings outstanding       0      
Line of credit facility, current borrowing capacity       3,500,000,000      
Revolving Credit Facility [Member] | Commercial Paper Program [Member]              
Debt Instrument [Line Items]              
Borrowings outstanding       600,000,000      
Aggregate principal amount issued       3,500,000,000      
Revolving Credit Facility [Member] | Letter of Credit [Member] | TRGP Senior Revolving Credit Facility due February 2030 [Member]              
Debt Instrument [Line Items]              
Remaining liquidity needs       $ 2,900,000,000      
Senior Unsecured Notes [Member] | Senior Unsecured 5.200% Fixed Rate, due July 2027 [Member]              
Debt Instrument [Line Items]              
Maturity date     Jul. 31, 2027     Jul. 31, 2027  
Interest rate on fixed rate debt   5.20% 5.20%     5.20%  
Senior Unsecured Notes [Member] | Senior Unsecured 4.350% Fixed Rate, due January 2029 [Member]              
Debt Instrument [Line Items]              
Maturity date     Jan. 29, 2029     Jan. 29, 2029  
Interest rate on fixed rate debt   4.35% 4.35%     4.35%  
Senior Unsecured Notes [Member] | Senior Unsecured 6.150% Fixed Rate, due March 2029 [Member]              
Debt Instrument [Line Items]              
Maturity date     Mar. 31, 2029     Mar. 31, 2029  
Senior Unsecured Notes [Member] | Senior Unsecured 4.900% Fixed Rate, due September 2030 [Member]              
Debt Instrument [Line Items]              
Maturity date     Sep. 30, 2030     Sep. 30, 2030  
Interest rate on fixed rate debt   4.90% 4.90%     4.90%  
Senior Unsecured Notes [Member] | Senior Unsecured 4.350% fixed rate, due April 2031 [Member]              
Debt Instrument [Line Items]              
Maturity date     Apr. 30, 2031     Apr. 30, 2031  
Interest rate on fixed rate debt   4.35% 4.35%     4.35%  
Senior Unsecured Notes [Member] | Senior Unsecured 4.200% Notes due February 2033 [Member]              
Debt Instrument [Line Items]              
Maturity date     Feb. 28, 2033     Feb. 28, 2023  
Interest rate on fixed rate debt   4.20% 4.20%     4.20%  
Senior Unsecured Notes [Member] | Senior Unsecured 6.125% Fixed Rate, due March 2033 [Member]              
Debt Instrument [Line Items]              
Maturity date     Mar. 31, 2033     Mar. 31, 2033  
Interest rate on fixed rate debt   6.125% 6.125%     6.125%  
Senior Unsecured Notes [Member] | Senior Unsecured 6.500% Fixed Rate, due March 2034 [Member]              
Debt Instrument [Line Items]              
Maturity date     Mar. 31, 2034     Mar. 31, 2034  
Interest rate on fixed rate debt   6.50% 6.50%     6.50%  
Senior Unsecured Notes [Member] | Senior Unsecured 5.500% Fixed Rate, due February 2035 [Member]              
Debt Instrument [Line Items]              
Maturity date     Feb. 28, 2035     Feb. 28, 2035  
Interest rate on fixed rate debt   5.50% 5.50%     5.50%  
Senior Unsecured Notes [Member] | Senior Unsecured 5.550% Fixed Rate, due August 2035 [Member]              
Debt Instrument [Line Items]              
Maturity date     Aug. 31, 2035     Aug. 31, 2035  
Interest rate on fixed rate debt   5.55% 5.55%     5.55%  
Senior Unsecured Notes [Member] | Senior Unsecured Notes Due February 2036 [Member]              
Debt Instrument [Line Items]              
Maturity date     Feb. 29, 2036     Feb. 29, 2036  
Interest rate on fixed rate debt   5.65% 5.65%     5.65%  
Senior Unsecured Notes [Member] | Senior Unsecured Notes Due July 2036 [Member]              
Debt Instrument [Line Items]              
Maturity date     Jul. 31, 2036     Jul. 31, 2036  
Interest rate on fixed rate debt   5.40% 5.40%     5.40%  
Senior Unsecured Notes [Member] | Senior Unsecured 4.950% Notes due April 2052 [Member]              
Debt Instrument [Line Items]              
Maturity date     Apr. 30, 2052     Apr. 30, 2052  
Interest rate on fixed rate debt   4.95% 4.95%     4.95%  
Senior Unsecured Notes [Member] | Senior Unsecured 6.250% fixed rate, due July 2052 [Member]              
Debt Instrument [Line Items]              
Maturity date     Jul. 31, 2052     Jul. 31, 2052  
Interest rate on fixed rate debt   6.25% 6.25%     6.25%  
Senior Unsecured Notes [Member] | Senior Unsecured 6.500% Fixed Rate, due February 2053 [Member]              
Debt Instrument [Line Items]              
Maturity date     Feb. 28, 2053     Feb. 28, 2053  
Interest rate on fixed rate debt   6.50% 6.50%     6.50%  
Senior Unsecured Notes [Member] | Senior Unsecured 6.125% Fixed Rate, due May 2055 [Member]              
Debt Instrument [Line Items]              
Maturity date     May 31, 2055     May 31, 2055  
Interest rate on fixed rate debt   6.125% 6.125%     6.125%  
Senior Unsecured Notes [Member] | Senior Unsecured of 6.875% Senior Notes due January 2029 [Member]              
Debt Instrument [Line Items]              
Interest rate on fixed rate debt             6.875%
Senior Unsecured Notes [Member] | Senior Unsecured of 4.350% Senior Notes due 2031 [Member]              
Debt Instrument [Line Items]              
Interest rate on fixed rate debt   4.35% 4.35%        
Aggregate principal amount issued   $ 750,000,000 $ 750,000,000        
Senior Unsecured Notes [Member] | Senior Unsecured of 6.050% Senior Notes due 2056 [Member]              
Debt Instrument [Line Items]              
Interest rate on fixed rate debt   6.05% 6.05%        
Aggregate principal amount issued   $ 750,000,000 $ 750,000,000        
Net proceeds from private placement of notes   $ 1,483,200,000          
Targa Resources Partners LP [Member] | Accounts Receivable Securitization Facility [Member] | Accounts Receivable Securitization Facility, due August 2025 [Member]              
Debt Instrument [Line Items]              
Maturity date     Aug. 31, 2025     Aug. 31, 2025  
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 6.050% Fixed Rate, due May 2056 [Member]              
Debt Instrument [Line Items]              
Maturity date     May 31, 2056     May 31, 2056  
Interest rate on fixed rate debt   6.05% 6.05%     6.05%  
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured 5.000% Notes due January 2028 [Member]              
Debt Instrument [Line Items]              
Maturity date     Jan. 31, 2028     Jan. 31, 2028  
Interest rate on fixed rate debt   5.00% 5.00%     5.00%  
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured of 6.875% Senior Notes due January 2029 [Member]              
Debt Instrument [Line Items]              
Maturity date     Jan. 31, 2029     Jan. 31, 2029  
Interest rate on fixed rate debt   6.875% 6.875%     6.875%  
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured of 5.500% Senior Notes due March 2030 [Member]              
Debt Instrument [Line Items]              
Maturity date     Mar. 31, 2030     Mar. 31, 2030  
Interest rate on fixed rate debt   5.50% 5.50%     5.50%  
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured of 4.875% Senior Notes due February 2031 [Member]              
Debt Instrument [Line Items]              
Maturity date     Feb. 28, 2031     Feb. 28, 2031  
Interest rate on fixed rate debt   4.875% 4.875%     4.875%  
Targa Resources Partners LP [Member] | Senior Unsecured Notes [Member] | Senior Unsecured of 4.000% Senior Notes due January 2032 [Member]              
Debt Instrument [Line Items]              
Maturity date     Jan. 31, 2032     Jan. 31, 2032  
Interest rate on fixed rate debt   4.00% 4.00%     4.00%  
[1] As of June 30, 2026, the Partnership had $451.0 million of qualifying receivables under its $600.0 million accounts receivable securitization facility (the “Securitization Facility”), resulting in $149.0 million remaining availability. In July 2026, the Partnership amended the Securitization Facility to, among other things, extend the facility termination date to July 30, 2027 and increase the total borrowing capacity from up to $600.0 million to up to $800.0 million.