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Sale of Energy, Chemicals and Resources ("ECR") Business - Narrative (Details) - USD ($) $ in Thousands, shares in Millions |  |  | 3 Months Ended | 8 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Mar. 27, 2020 | Apr. 26, 2019 | Jun. 26, 2020 | Jun. 28, 2019 | Dec. 31, 2019 | Jun. 26, 2020 | Jun. 28, 2019 | Sep. 27, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Selling, general and administrative expenses |  |  | $ 434,650 | $ 536,180 |  | $ 1,408,232 | $ 1,505,731 |
Loss (Gain) on investment in equity securities |  |  |  |  |  | (138,875) | 2,175 |
NPMC |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Selling, general and administrative expenses |  |  |  |  |  | 50,000 |  |
Worley |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Consideration transferred |  | $ 3,400,000 |  |  |  |  |  |
Consideration paid in cash |  | 2,800,000 |  |  |  |  |  |
TSA related income |  |  | 1,000 |  |  | 15,200 |  |
Worley | Discontinued Operations |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Gain on sale of businesses |  |  | 31,456 | $ 917,697 |  | 113,366 | $ 917,697 | $ 935,100
Pre-tax gain on sale |  | 1,000,000 |  |  |  |  |  |
Fair value of retained interest |  | 33,000 |  |  |  |  |  |
Deferred gain on disposal |  | 34,400 |  |  |  |  |  |
Proceeds received on a relative fair value basis |  | $ 95,300 |  |  |  |  |  |
Worley Stock |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Ordinary shares included in purchase price (in shares) |  | 58.2 |  |  |  |  |  |
Sale of stock (in shares) |  |  |  |  | 6.8 |  |  |
Loss on sale of stock |  |  |  |  | $ 4,900 |  |  |
Worley Stock | Restricted Stock |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Ordinary shares included in purchase price (in shares) |  |  |  |  | 51.4 |  |  |
Estimated fair value of shares | $ 312,300 |  |  |  |  |  |  |
Loss (Gain) on investment in equity securities |  |  | $ 131,400 |  |  | (138,900) |  |
Dividends |  |  |  |  |  | $ 7,700 |  |

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- Definition The difference between the carrying value and the sale price of an investment. A loss would be recognized when the sale price of the investment is less than the carrying value of the investment. This element refers to the Loss included in earnings and not to the cash proceeds of the sale. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(9)(a)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(a)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(7)(c)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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