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Description of Business and Basis of Presentation - Additional Information (Detail) - $ / shares
6 Months Ended 12 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Jun. 15, 2023
Business Acquisition [Line Items]      
Business Acquisition, Share Price     $ 41.75
Investments in Greater Than 20%      
Business Acquisition [Line Items]      
Equity method ownership investment (as percent) 20.00%    
Investments in Less Than 20%      
Business Acquisition [Line Items]      
Equity method ownership investment (as percent) 20.00%    
DCP Midstream, LLC | DCP Midstream GP, LLC      
Business Acquisition [Line Items]      
Ownership interest percentage by parent 100.00%    
Phillips 66 | DCP Midstream LP      
Business Acquisition [Line Items]      
Ownership interest percentage by parent   43.30%  
Limited Liability Company (LLC) Or Limited Partnership (LP) Managing Member Or General Partner Ownership Interest Post Merger 86.80%    
Enbridge | DCP Midstream LP      
Business Acquisition [Line Items]      
Limited Liability Company (LLC) Or Limited Partnership (LP) Managing Member Or General Partner Ownership Interest Post Merger 13.20% 13.20%