General - Supplemental Cash Flow Information (Details) - Continuing Operations - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
SUPPLEMENTAL CASH FLOW INFORMATION
Income tax payments	$ (122)	$ (168)
Income tax refunds received	42	26
Interest paid	(607)	(548)
Capitalized interest	$ 15	$ 24

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of interest costs capitalized disclosed as an adjusting item to interest costs incurred.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

+ References

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The amount of cash received during the period as refunds for the overpayment of taxes.

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