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Inventories - Schedule of Inventories (Detail) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Components Of Inventory [Line Items]    
Total inventories $ 41 $ 83
Natural Gas [Member]    
Components Of Inventory [Line Items]    
Total inventories 20 47
Natural Gas Liquids    
Components Of Inventory [Line Items]    
Total inventories $ 21 $ 36