Operating Segments and Related Disclosures (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Schedule of Selected Financial Information for Each Reportable Segment

Selected financial information for each operating segment is as follows:

	Three months ended March 31,
	2018			2017
	(In millions)
Net Sales:
Aerospace and Defense	$	490.4		$	403.7
Real Estate	1.6			1.6
Total Net Sales	$	492.0		$	405.3
Segment Performance:
Aerospace and Defense	$	36.6		$	38.2
Environmental remediation provision adjustments	(1.3		)	(0.6		)
GAAP/Cost Accounting Standards retirement benefits expense difference	(1.0		)	(3.5		)
Unusual items	—			0.6
Aerospace and Defense Total	34.3			34.7
Real Estate	0.6			0.8
Total Segment Performance	$	34.9		$	35.5
Reconciliation of segment performance to income before income taxes:
Segment performance	$	34.9		$	35.5
Interest expense	(8.1		)	(7.4		)
Interest income	1.6			0.5
Stock-based compensation expense	(1.5		)	(6.8		)
Corporate retirement benefits expense	(3.3		)	(5.0		)
Corporate and other expense, net	(4.9		)	(6.6		)
Unusual items	—			(1.0		)
Income before income taxes	$	18.7		$	9.2

Summary of Customers that Represented More than 10% of Net Sales

Customers that represented more than 10% of net sales for the periods presented were as follows:

	Three months ended March 31,
	2018		2017
Lockheed Martin Corporation	29	%	18	%
Raytheon Company	21		18
United Launch Alliance	20		23
NASA	17		18
Boeing	*		11

_________

* Less than 10%.