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Acquisitions and Divestitures, Goodwill and Intangible Assets - Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018 | Apr. 03, 2018
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Goodwill | [1] | $ 19,662 | $ 19,594 |
CSRA |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash and equivalents |  |  |  | $ 45
Accounts receivable |  |  |  | 155
Unbilled receivables |  |  |  | 415
Other current assets |  |  |  | 303
Property, plant and equipment, net |  |  |  | 326
Intangible assets, net |  |  |  | 2,066
Goodwill |  |  |  | 7,935
Other noncurrent assets |  |  |  | 369
Total assets |  |  |  | 11,614
Accounts payable |  |  |  | (135)
Customer advances and deposits |  |  |  | (151)
Current lease obligation |  |  |  | (51)
Other current liabilities |  |  |  | (434)
Noncurrent lease obligation |  |  |  | (207)
Noncurrent deferred tax liability |  |  |  | (355)
Other noncurrent liabilities |  |  |  | (532)
Total liabilities |  |  |  | (1,865)
Net assets acquired |  |  |  | $ 9,749
[1] | Goodwill in the Information Technology and Mission Systems reporting units is net of $536 and $1.3 billion of accumulated impairment losses, respectively.

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