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Debt Obligations (Debt Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Unamortized Discounts, Premiums, Fair Value Adjustments and Deferred Debt Issuance Costs $ (42)  
Five Year Credit Facility    
Line of Credit Facility, Current Borrowing Capacity 5,000  
Letters of Credit Outstanding, Amount 32  
Line of Credit Facility, Remaining Borrowing Capacity $ 4,180  
Line of Credit Facility, Interest Rate at Period End 5.12%  
Outstanding borrowings $ 793  
Long-term Commercial Paper, Noncurrent 750  
USAC [Member] | USAC Credit Facility, due 2023 [Member]    
Line of Credit Facility, Current Borrowing Capacity 954  
Letters of Credit Outstanding, Amount 0  
Line of Credit Facility, Remaining Borrowing Capacity $ 333  
Line of Credit Facility, Interest Rate at Period End 6.84%  
Outstanding borrowings $ 646  
Line of Credit Facility, Maximum Borrowing Capacity 1,600  
Sunoco LP [Member] | Sunoco LP $1.5 billion Revolving Credit Facility due July 2023 [Member]    
Line of Credit Facility, Current Borrowing Capacity 1,500  
Letters of Credit Outstanding, Amount 7  
Line of Credit Facility, Remaining Borrowing Capacity $ 593  
Line of Credit Facility, Interest Rate at Period End 6.17%  
Outstanding borrowings $ 900 $ 581
Accordion feature [Member] | Five Year Credit Facility    
Line of Credit Facility, Current Borrowing Capacity 7,000  
Accordion feature [Member] | USAC [Member] | USAC Credit Facility, due 2023 [Member]    
Line of Credit Facility, Maximum Borrowing Capacity $ 200