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Revenue Recognition and Related Balance Sheet Accounts - Revenue Disaggregated by Geographic Location and Contract Type (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 17,073,903 | $ 12,980,213 | $ 11,202,672
Percentage of total revenues | 100.00% | 100.00% | 100.00%
United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 14,390,237 | $ 11,068,493 | $ 9,618,951
Percentage of total revenues | 84.30% | 85.30% | 85.80%
Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 2,020,853 | $ 1,557,117 | $ 1,252,365
Percentage of total revenues | 11.80% | 12.00% | 11.20%
Australia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 428,321 | $ 221,038 | $ 200,664
Percentage of total revenues | 2.50% | 1.70% | 1.80%
Others |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 234,492 | $ 133,565 | $ 130,692
Percentage of total revenues | 1.40% | 1.00% | 1.20%
Fixed price contracts |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 7,282,537 | $ 4,849,038 | $ 4,380,539
Percentage of total revenues | 42.70% | 37.40% | 39.10%
Unit-price contracts |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 5,927,335 | $ 5,029,100 | $ 4,172,363
Percentage of total revenues | 34.70% | 38.70% | 37.20%
Cost-plus contracts |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenues | $ 3,864,031 | $ 3,102,075 | $ 2,649,770
Percentage of total revenues | 22.60% | 23.90% | 23.70%

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
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