Variable Interest Entities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Variable Interest Entity [Line Items]
Assets, current	$ 3,868,483,000		$ 3,868,483,000		$ 3,862,492,000
Liabilities, current	1,963,321,000		1,963,321,000		1,777,113,000
Revenue	$ 861,027,000	$ 1,219,243,000	$ 1,813,181,000	$ 2,426,838,000
Purple Line Extension Section 2 And Section 3
Variable Interest Entity [Line Items]
Percent interest in the joint venture			75.00%
Newark Airport Terminal One Design Build Project
Variable Interest Entity [Line Items]
Percent interest in the joint venture			80.00%
Joint Venture With O&G Industries | Purple Line Extension Section 2 And Section 3
Variable Interest Entity [Line Items]
Revenue			$ 2,800,000,000
O&G | Purple Line Extension Section 2 And Section 3
Variable Interest Entity [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners	25.00%		25.00%
Joint Venture With Parsons | Newark Airport Terminal One Design Build Project
Variable Interest Entity [Line Items]
Revenue			$ 1,400,000,000
Parsons Corporation | Newark Airport Terminal One Design Build Project
Variable Interest Entity [Line Items]
Noncontrolling interest, ownership percentage by noncontrolling owners	20.00%		20.00%
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Assets, current	$ 400,000		$ 400,000		700,000
Liabilities, current	0		0		400,000
VIEs
Variable Interest Entity [Line Items]
Assets, current	558,400,000		558,400,000		568,200,000
Liabilities, current	576,100,000		576,100,000		496,900,000
Assets, noncurrent	$ 14,400,000		$ 14,400,000		$ 3,000,000