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Summary of Significant Accounting Policies - Prepaid Expenses (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Prepaid expenses	$ 431	$ 410
Receivables, long-term contracts or programs	164	77
Credit Card Receivable Reserve
Loss Contingencies [Line Items]
Loss contingency accrual	$ 7	$ 7

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Amount of loss contingency liability.

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Amount to be collected within one year of the balance sheet date (or one operating cycle, if longer) from customers in accordance with the contractual provisions of long-term contracts or programs including amounts billed and unbilled as of the balance sheet date.

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