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Revenue Recognition (Tables)
 3 Months Ended
Mar. 31, 2022
Revenue from Contract with Customer [Abstract]  
Summary of Impact of Contracts in Progress on Statement of Operations The following table summarizes the impact of the changes in significant contract accounting estimates on the Company’s Aerospace and Defense segment operating results:
Three months ended March 31,
 20222021
 (In millions, except per share amounts)
Net unfavorable effect of the changes in contract estimates on net sales$(0.2)$(1.9)
Net unfavorable effect of the changes in contract estimates on income before income taxes(2.7)(2.4)
Net unfavorable effect of the changes in contract estimates on net income (2.0)(1.9)
Net unfavorable effect of the changes in contract estimates on basic and diluted EPS(0.02)(0.02)
Schedule of Contract Asset and Liability The following table summarizes contract assets and liabilities:
March 31, 2022December 31, 2021
 (In millions)
Contract assets$378.6 $359.6 
Reserve for overhead rate disallowance(6.6)(5.4)
Contract assets, net of reserve372.0 354.2 
Contract liabilities366.7 366.5 
Net contract assets (liabilities), net of reserve$5.3 $(12.3)
Schedules of Percentage of Net Sales by Contract and Customer Type The following table summarizes the percentages of net sales by contract type:
Three months ended March 31,
 20222021
Fixed-price56 %51 %
Cost-reimbursable44 49 
The principal end user customers are primarily agencies of the U.S. government as illustrated in the following table:
Three months ended March 31,
 20222021
U.S. government95 %97 %
Non U.S. government5 3