Commitments and Contingencies - Other and Bonds (Details) $ in Millions	3 Months Ended
Mar. 31, 2022 USD ($) item
Obligation to perform subcontract work \| Pending Litigation
Commitments and Contingencies
Letter of intent under dispute \| item	2
Damages claimed	$ 9
Obligation to perform subcontract work \| Customer \| Pending Litigation
Commitments and Contingencies
Damages claimed	$ 12
Surety \| Minimum
Surety
Percentage of business which has required bonds	15.00%
Surety \| Maximum
Surety
Percentage of business which has required bonds	25.00%

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Name:	us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration