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Acquisitions and Dispositions (Aspire Defence Subcontracting Joint Ventures) (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Apr. 18, 2018 | Sep. 30, 2019 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 15, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  | $ 1,265,000,000 | $ 1,265,000,000 | $ 968,000,000 |
Acquisition related costs |  |  |  | 2,000,000 | 7,000,000 | $ 0 |
Aspire |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Gain on consolidation of entities |  |  | $ 108,000,000 |  | 108,000,000 |  |
Goodwill |  |  |  |  |  |  | $ 42,000,000
Fair value of total consideration transferred | $ 50,000,000 |  |  |  |  |  |
Adjustment to noncontrolling interests | 119,000,000 |  |  |  |  |  |
Net increase to PIC | $ 69,000,000 |  |  |  |  |  |
Acquisition related costs |  | $ 0 |  |  | 1,000,000 |  |
Revenues contributed by acquiree |  |  |  | 535,000,000 | 533,000,000 |  |
Gross profit contributed by acquiree |  |  |  | $ 71,000,000 | $ 61,000,000 |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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