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Revenue - Narrative (Details) - Infrastructure
$ in Millions
Mar. 31, 2021
USD ($)
Revenue from External Customer [Line Items]  
Change in contract assets costs in excess of billings, new commercial contracts $ 35.5
Change in contract assets costs in excess of billings, transfer to receivables 25.4
Change in contract liabilities costs in excess of billings, new commercial contracts 38.7
Change in contract liabilities costs in excess of billings, transfer to receivables 32.4
Remaining commitment obligations, amount $ 8.9