Acquisitions and Other Transactions - April 2020 Transaction (Details) $ / shares in Units, $ in Millions		3 Months Ended													12 Months Ended
	Apr. 01, 2020 USD ($) quarter $ / shares shares	Dec. 31, 2021 USD ($) $ / shares	Sep. 30, 2021 $ / shares	Jun. 30, 2021 $ / shares	Mar. 31, 2021 $ / shares	Dec. 31, 2020 USD ($) $ / shares	Sep. 30, 2020 $ / shares	Jun. 30, 2020 $ / shares	Mar. 31, 2020 $ / shares	Dec. 31, 2019 $ / shares	Sep. 30, 2019 $ / shares	Jun. 30, 2019 $ / shares	Mar. 31, 2019 $ / shares	Dec. 31, 2018 $ / shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 $ / shares	Jul. 01, 2021 USD ($)
Asset Acquisition [Line Items]
Equity method investments		$ 974				$ 1,013									$ 974	$ 1,013
Financing receivables – related parties		293				298									293	298
Equity method investments and other assets	$ 720
Partners' capital		$ (494)				$ (481)									$ (494)	$ (481)
Common units (in units) | shares	393,289,537
Distributions per Limited Partner unit (in dollars per share) | $ / shares		$ 0.30000	$ 0.30000	$ 0.30000	$ 0.46000	$ 0.46000	$ 0.46000	$ 0.46000	$ 0.46000	$ 0.46000	$ 0.44500	$ 0.43000	$ 0.41500	$ 0.40000	$ 1.36	$ 1.84	$ 1.75
Norco Transaction | Affiliated Entity | Valuation Technique, Discounted Cash Flow
Asset Acquisition [Line Items]
Measurement input	11.00%
Norco Transaction | April 2020 Transaction
Asset Acquisition [Line Items]
Financing receivables – related parties	$ 302
Norco Transaction | April 2020 Transaction | Affiliated Entity
Asset Acquisition [Line Items]
Contract assets - related parties	244
Consideration allocated, fair value	$ 546
Norco Transaction | April 2020 Transaction | Affiliated Entity | Revenue expected to be recognized on multi-year terminaling service contracts
Asset Acquisition [Line Items]
Annual payments receivable		$ 140													$ 140			$ 147
Annual payments receivable, gross		151													151			158
Annual payments receivable, net		$ 11													$ 11			$ 11
Mattox Transaction | Affiliated Entity | Valuation Technique, Discounted Cash Flow
Asset Acquisition [Line Items]
Measurement input	14.00%
GP/IDR Restructuring | Affiliated Entity | Valuation Technique, Discounted Cash Flow
Asset Acquisition [Line Items]
Measurement input	20.00%
Preferred Units
Asset Acquisition [Line Items]
Distributions per Limited Partner unit (in dollars per share) | $ / shares	$ 0.2363														$ 0.9452	$ 0.7089
General Partner SPLC
Asset Acquisition [Line Items]
Unit distribution (in units) | shares															0
Partners' capital	$ (4,000)
Economic Interest | General Partner SPLC
Asset Acquisition [Line Items]
Noncontrolling interest	2.00%	2.00%													2.00%
Shell Pipeline Company L P | Limited Partner
Asset Acquisition [Line Items]
Common units (in units) | shares	269,457,304
Ownership interest (in percentage)	68.50%
Mattox Pipeline Company LLC (“Mattox”)
Asset Acquisition [Line Items]
Equity method investments	$ 174
Purchase And Sale Agreement | Mattox Pipeline Company LLC (“Mattox”)
Asset Acquisition [Line Items]
Equity method investment, ownership interest acquired	79.00%
Partnership Interests Restructuring Agreement | General Partner SPLC
Asset Acquisition [Line Items]
Distributions payable, amount waved	$ 20
Distribution payable, number of consecutive quarters | quarter	4
Partnership Interests Restructuring Agreement | Limited Partner | Series A Perpetual Convertible Preferred Units
Asset Acquisition [Line Items]
Unit distribution (in units) | shares	50,782,904
Unit distribution (in dollars per unit) | $ / shares	$ 23.63
Partnership Interests Restructuring Agreement | Limited Partner | Common Units
Asset Acquisition [Line Items]
Unit distribution (in units) | shares	160,000,000