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Revenue (Accounts Receivable, Contract Assets and Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Revenue from External Customer [Line Items]
Accounts receivable	$ 934	$ 899
Unbilled
Revenue from External Customer [Line Items]
Accounts receivable	479	476
Trade & other
Revenue from External Customer [Line Items]
Accounts receivable	$ 455	$ 423

X

- Definition

Amount, after allowance for credit loss, of accounts and financing receivables, classified as current. Includes, but is not limited to, notes and loan receivable.

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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.

+ References

No definition available.

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