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Contract Assets and Contract Liabilities - Narrative (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]    
Noncurrent contract assets $ 112.4 $ 101.0
Noncurrent contract liabilities 72.3 79.6
Provisions for loss contracts $ 120.2 $ 108.9