Accrued Expenses and Other Current Liabilities - Summary of Restructuring and Other Related Reorganization Costs (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost And Reserve [Line Items]
Accrued liability as of December 31, 2019	$ 203
Charges	41	$ 1
Accrued liability as of December 31, 2020	160	203
Restructuring and Other Related Reorganization Costs
Restructuring Cost And Reserve [Line Items]
Accrued liability as of December 31, 2019	1
Charges	41
Payments	$ (42)
Accrued liability as of December 31, 2020		$ 1

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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