Borrowings - Short-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Short-term debt disclosures
Commercial paper		$ 304
Short-term loans	$ 130	971
Long-term debt - current maturities	7,053	7,522
Short-term Debt, Total	$ 7,183	$ 8,797
Commercial paper
Short-term debt disclosures
Weighted-average interest rates for short-term debt (as a percent)		1.60%
Short-term loans
Short-term debt disclosures
Weighted-average interest rates for short-term debt (as a percent)	5.70%	6.10%

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Amount of long-term debt and lease obligation, classified as current.

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Amount of borrowings from a bank classified as other, maturing within one year or operating cycle, if longer.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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