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Estimates (Schedule of Inventory) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Inventory, Net [Abstract]
Natural gas, NGLs and refined products	$ 1,259	$ 1,013
Crude oil	328	287
Spare parts and other	427	439
Total inventories	$ 2,014	$ 1,739

X

- Definition

Carrying amount as of the balance sheet date of natural gas in storage, which is a mixture of gases (liquefied or otherwise), used for fuel and manufacturing purposes, which is ready for sale.

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Carrying amount as of the balance sheet date of finished goods inventories for petroleum products, crude oil, petrochemical products, and other oil and gas inventories.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer.

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