Acquisitions and Other Transactions Schedule of Acquisitions (Details) - SemGroup [Member] $ in Millions	Dec. 05, 2019 USD ($)
Business Acquisition [Line Items]
Total current assets	$ 794
Property, plant and equipment	3,891
Other non-current assets	617
Goodwill	295
Intangible assets	460
Total assets	6,057
Total current liabilities	629
Long-term debt, less current maturities (1)	2,576	[1]
Other non-current liabilities	197
SemCAMS Preferred shares	241
Total liabilities	3,643
Noncontrolling interest	822
Partners’ capital	1,592
Total liabilities and partners’ capital	$ 6,057

[1] Long-term debt at December 5, 2019 includes SemGroup senior notes with an aggregate principal amount of $1.375 billion and SemGroup subsidiary debt of $593 million, all of 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.