v3.20.4

Fair Value of Financial Assets and Liabilities - Summary of Financial Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets:
Marketable equity securities	$ 19	$ 1
Estimate of Fair Value Measurement [Member] | Level 1
Assets:
Marketable equity securities	19	1
Estimate of Fair Value Measurement [Member] | Level 2
Assets:
Derivative instruments-assets	18	10
Liabilities:
Derivative instruments-liabilities	0	(1)
Estimate of Fair Value Measurement [Member] | Money market funds | Level 1
Assets:
Money market funds	$ 1,469	$ 6

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Amount of investment in marketable security.

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