(Deficit) Equity - Schedule of Number of Units Outstanding (Details) - shares		12 Months Ended
	Apr. 01, 2020	Dec. 31, 2021	Dec. 31, 2020
General Partner SPLC
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in units)		0
April 2020 Acquisition (in units)			(4,761,012)
Unit distribution (in units)		0
Ending balance (in units)	4,761,012	0	0
Preferred Partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in units)		50,782,904	0
April 2020 Acquisition (in units)			50,782,904
Unit distribution (in units)		0
Ending balance (in units)		50,782,904	50,782,904
General Public | Common Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in units)		123,832,233	123,832,233
April 2020 Acquisition (in units)			0
Unit distribution (in units)		0
Ending balance (in units)		123,832,233	123,832,233
Shell Pipeline Company L P | Common Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in units)		269,457,304	109,457,304
April 2020 Acquisition (in units)			160,000,000
Unit distribution (in units)		0
Ending balance (in units)		269,457,304	269,457,304