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Description of the Business and Basis of Presentation - Narrative (Details)
3 Months Ended
Mar. 31, 2022
segment
shares
Feb. 11, 2022
$ / shares
Dec. 31, 2021
shares
Description Of Business And Basis Of Presentation [Line Items]      
Unit distribution (in units) 50,782,904   50,782,904
Number of segments | segment 1    
Take Private Proposal | Shell Pipeline Company L P      
Description Of Business And Basis Of Presentation [Line Items]      
Issued and outstanding affiliates per share value (in dollars per share) | $ / shares   $ 12.89  
Limited Partner | Partnership Interests Restructuring Agreement | Series A Perpetual Convertible Preferred Units      
Description Of Business And Basis Of Presentation [Line Items]      
Unit distribution (in units) 50,782,904   50,782,904
Shell Pipeline Company L P | Limited Partner      
Description Of Business And Basis Of Presentation [Line Items]      
Ownership interest (in percentage) 68.50%    
Common units (in shares) 269,457,304    
Shell Pipeline Company L P | Limited Partner | Common Units And Series A Perpetual Convertible Preferred Units      
Description Of Business And Basis Of Presentation [Line Items]      
Ownership interest (in percentage) 72.00%