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Acquisitions and Divestitures, Divestitures, Goodwill and Intangible Assets - Additional Information (Details) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 03, 2018 USD ($) $ / shares | Jul. 01, 2018 USD ($) | Jul. 02, 2017 USD ($) | Jul. 01, 2018 USD ($) business | Jul. 02, 2017 USD ($) | Dec. 31, 2017 USD ($) business
Business Acquisition [Line Items] |  |  |  |  |  |
Amortization expense |  | $ 84 | $ 19 | $ 104 | $ 38 |
CSRA |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Estimated acquired intangible assets | $ 2,069 |  |  |  |  |
Goodwill expected to be deductible for tax purposes | 490 |  |  |  |  |
Revenues of acquiree included in reported results since acquisition date |  | 1,300 |  | 1,300 |  |
Operating earnings of acquiree included in reported results since acquisition date |  | 134 |  | 134 |  |
Pre-tax earnings of acquiree included in reported results since acquisition date |  | 147 |  | 147 |  |
Payments to acquire businesses, gross | 9,749 |  |  |  |  |
Acquisition-related costs |  |  |  | $ 45 |  |
CSRA | Backlog and Customer Relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Estimated acquired intangible assets | $ 2,100 |  |  |  |  |
Weighted-average amortization life of acquired intangible assets | 17 years |  |  |  |  |
Percentage of aggregate value of acquired intangible assets to be amortized over 7 years | 50.00% |  |  |  |  |
Estimated period of amortization of 50% of the aggregate value of the intangible assets acquired under accelerated method | 6 years |  |  |  |  |
CSRA | Operating costs and expenses and other income (expense) |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquisition-related costs |  | $ 75 |  |  |  |
CSRA | Common Stock |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percentage of interest acquired | 100.00% |  |  |  |  |
Cash acquisition price (in dollars per share) | $ / shares | $ 41.25 |  |  |  |  |
Series of Individually Immaterial Business Acquisitions |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of businesses acquired | business |  |  |  | 2 |  | 4
Payments to acquire businesses, gross |  |  |  | $ 335 |  | $ 399

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- Definition Acquired Finite-lived Intangible Assets, Estimated Amortization Period of 50% Aggregate Value of Assets Under Accelerated Method + References No definition available. + Details
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- Definition Business Combination, Pro Forma Information, Earnings or Loss Before Tax of Acquiree since Acquisition Date, Actual + References No definition available. + Details
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- Definition Business Combination, Pro Forma Information, Operating Earnings or Loss of Acquiree since Acquisition Date, Actual + References No definition available. + Details
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- Definition Percentage of Aggregate Value of Acquired Finite-lived Intangible Assets To Be Amortized Over 7 Years + References No definition available. + Details
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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