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Supplemental Financial Information - Interest Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest Income Expense Net
Interest expense, net of capitalized interest	$ 40	$ 28	$ 70	$ 53
Interest income	(4)	(8)	(13)	(15)
Interest expense, net	$ 36	$ 20	$ 57	$ 38

X

- Definition

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

+ References

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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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