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SUPPLEMENTAL FINANCIAL INFORMATION - Interest Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest Income Expense Net
Interest expense, net of capitalized interest	$ 37	$ 40	$ 74	$ 70
Interest income	(3)	(4)	(6)	(13)
Interest expense, net	$ 34	$ 36	$ 68	$ 57

X

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

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- Definition

The net amount of operating interest income (expense).

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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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