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Partnerships and Joint Ventures - Summary of Aggregate Financial Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]                      
Current assets $ 5,034,009       $ 5,366,763       $ 5,034,009 $ 5,366,763  
Total noncurrent assets 2,275,803       2,599,895       2,275,803 2,599,895  
Total current liabilities 3,572,037       3,905,122       3,572,037 3,905,122  
Revenue 3,655,700 $ 3,803,200 $ 4,091,000 $ 4,118,600 4,408,700 $ 4,628,600 $ 4,146,400 $ 4,133,600 15,668,477 17,317,284 $ 18,851,008
Cost of revenue 3,533,000 3,669,500 4,023,500 4,057,200 4,348,000 4,537,300 4,577,600 4,070,900 15,283,226 17,533,864 18,281,628
Net earnings (163,300) $ 19,300 $ (25,000) $ (266,000) (296,200) $ (743,100) $ (414,000) $ (68,900) (435,046) (1,522,164) 173,468
Equity Method Investment, Nonconsolidated Investee or Group of Investees                      
Schedule of Equity Method Investments [Line Items]                      
Current assets 8,138,000       6,927,000       8,138,000 6,927,000  
Total noncurrent assets 4,745,000       5,109,000       4,745,000 5,109,000  
Total current liabilities 6,307,000       4,605,000       6,307,000 4,605,000  
Noncurrent liabilities $ 4,354,000       $ 5,256,000       4,354,000 5,256,000  
Revenue                 1,209,000 1,258,000 1,465,000
Cost of revenue                 1,104,000 1,151,000 1,338,000
Net earnings                 $ 54,000 $ 45,000 $ 35,000