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Segment Information (Unaudited)
 3 Months Ended
Mar. 31, 2013
Segment Reporting [Abstract]  
SEGMENT INFORMATION
SEGMENT INFORMATION
The company is aligned into four reportable segments: Aerospace Systems, Electronic Systems, Information Systems, and Technical Services. The United States (U.S.) government is the primary customer for all four of our segments. The company, from time to time, acquires or disposes of businesses and realigns contracts, programs or business areas among and within its operating segments. Portfolio shaping and internal realignments are designed to more fully leverage existing capabilities and enhance development and delivery of products and services.
The following table presents sales and operating income by segment:
 
Three Months Ended March 31
$ in millions
2013
 
2012
Sales
 
 
 
Aerospace Systems

$2,485

 

$2,383

Electronic Systems
1,721

 
1,724

Information Systems
1,674

 
1,844

Technical Services
717

 
750

Intersegment eliminations
(493
)
 
(503
)
Total sales
6,104

 
6,198

Operating income
 
 
 
Aerospace Systems
270

 
279

Electronic Systems
296

 
304

Information Systems
171

 
205

Technical Services
65

 
70

Intersegment eliminations
(54
)
 
(69
)
Total segment operating income
748


789

Reconciliation to total operating income:
 
 
 
Net FAS/CAS pension adjustment
33

 
32

Unallocated corporate expenses
(19
)
 
(23
)
Other
(3
)
 
(2
)
Total operating income

$ 759

 

$ 796


Unallocated Corporate Expenses
Unallocated corporate expenses include the portion of corporate expenses not considered allowable or allocable under applicable U.S. government Cost Accounting Standards (CAS) regulations and the Federal Acquisition Regulation, and are therefore not allocated to the segments. Such costs consist of a portion of management and administration, legal, environmental, compensation costs, retiree benefits, and certain unallowable costs such as lobbying activities, among others.
Net FAS/CAS Pension Adjustment
The net FAS (GAAP Financial Accounting Standards)/CAS pension adjustment is the difference between pension expense determined in accordance with GAAP and pension expense allocated to the operating segments determined in accordance with CAS. The net FAS/CAS pension adjustment for the three months ended March 31, 2013, was comparable to the same period in 2012.