Acquisitions and Other Transactions Schedule of Acquisitions (Details) - SemGroup [Member] $ in Millions	Dec. 05, 2019 USD ($)
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	$ 548
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	2,544
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	574
Business Acquisition, Purchase Price Allocation, Goodwill Expected to be Not Tax Deductible, Amount	230
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	280
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	4,176
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	480
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	812	[1]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	109
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	1,401
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value	335
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination	2,440
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ 4,176

[1] Long-term debt at December 5, 2019 includes SemGroup subsidiary debt of $593 million, which was redeemed in December 2019, subsequent to the closing of ET’s acquisition of SemGroup, using proceeds from an intercompany promissory note from ETO.