Remaining Unsatisfied Performance Obligations - Narrative (Details) $ in Billions	9 Months Ended
Sep. 30, 2021 USD ($)
Energy Solutions \| North America
Segment Reporting Information [Line Items]
Decrease in remaining unsatisfied performance obligation from cancelled project	$ 2

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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