XML 51 R29.htm IDEA: XBRL DOCUMENT v3.23.1
Revenue and Contracts with Customers (Contract with Customer Asset and Liability) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Provision for Loss on Contract Change $ (5.5)  
Deferred revenue 258.5 $ 258.4
Deferred revenue – change 0.1  
Contract With Customer, Advances, Liability, Current 14.8 14.8
Advances from customers, current 0.0  
Deferred Revenue, Noncurrent 46.2 46.2
Advances from customers, noncurrent - change 0.0  
Government [Member]    
Provision for Loss on Contracts $ 14.5 $ 20.0