Segment Information

12 Months Ended

Dec. 31, 2019

SEGMENT INFORMATION

We have five operating segments: Aerospace, Combat Systems, Information Technology, Mission Systems and Marine Systems. We organize our segments in accordance with the nature of products and services offered. We measure each segment’s profitability based on operating earnings. As a result, we do not allocate net interest, other income and expense items, and income taxes to our segments.

Summary financial information for each of our segments follows:



	Revenue						Operating Earnings							Revenue from U.S. Government
Year Ended December 31	2019		2018		2017		2019		2018			2017		2019		2018		2017
Aerospace	$	9,801	$	8,455	$	8,129	$	1,532	$	1,490		$	1,577	$	498	$	334	$	231
Combat Systems	7,007		6,241		5,949		996		962			937		4,048		3,228		3,084
Information Technology	8,422		8,269		4,410		628		608			373		8,240		8,025		4,164
Mission Systems	4,937		4,726		4,481		683		659			638		3,994		3,774		3,629
Marine Systems	9,183		8,502		8,004		785		761			685		9,027		8,245		7,913
Corporate	—		—		—		24		(23		)	26		—		—		—
Total	$	39,350	$	36,193	$	30,973	$	4,648	$	4,457		$	4,236	$	25,807	$	23,606	$	19,021

Corporate operating results have two primary components: pension and other post-retirement benefit income, and stock option expense. We are required to report the non-service cost components of pension and other post-retirement benefit cost (e.g., interest cost) in other income (expense) in the Consolidated Statement of Earnings. As described in Note R, in our defense segments, pension and other post-retirement benefit costs are recoverable contract costs. Therefore, the non-service cost components are included in the operating results of these segments, but an offset is reported in Corporate. Corporate operating results in 2018 also included one-time charges of approximately $45 associated with the costs to complete the CSRA acquisition.

The following is additional summary financial information for each of our segments:



	Identifiable Assets						Capital Expenditures						Depreciation and Amortization
Year Ended December 31	2019		2018		2017		2019		2018		2017		2019		2018		2017
Aerospace	$	12,324	$	11,220	$	10,126	$	138	$	194	$	132	$	178	$	154	$	147
Combat Systems	11,220		9,853		9,846		109		91		84		85		87		86
Information Technology	14,248		14,159		3,021		147		62		16		377		333		32
Mission Systems	6,205		5,984		5,856		75		49		47		60		65		60
Marine Systems	3,918		3,130		2,906		449		243		123		122		116		109
Corporate*	926		1,062		3,291		69		51		26		7		8		7
Total	$	48,841	$	45,408	$	35,046	$	987	$	690	$	428	$	829	$	763	$	441

* Corporate identifiable assets are primarily cash and equivalents.

See Note C for additional revenue information by segment.

The following table presents our revenue by geographic area based on the location of our customers:



Year Ended December 31	2019		2018		2017
North America:
United States	$	31,982	$	28,578	$	23,519
Other	852		755		915
Total North America	32,834		29,333		24,434
Europe	2,808		2,772		2,558
Asia/Pacific	1,670		2,252		2,011
Africa/Middle East	1,739		1,565		1,655
South America	299		271		315
Total revenue	$	39,350	$	36,193	$	30,973

Our revenue from non-U.S. operations was $4.4 billion in 2019, $4.2 billion in 2018 and $3.7 billion in 2017, and earnings from continuing operations before income taxes from non-U.S. operations were $600 in 2019, $578 in 2018 and $550 in 2017. The long-lived assets associated with these operations were 4% of our total long-lived assets on December 31, 2019, 3% on December 31, 2018, and 5% on December 31, 2017.