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Contractual Guarantees, Litigation, Investigations, and Insurance (Details) $ in Millions			1 Months Ended
	Aug. 30, 2019 USD ($)	Mar. 28, 2019 USD ($)	Aug. 31, 2017 USD ($)	Aug. 31, 2013 case	Sep. 28, 2012
UGL Infrastructure Pty Limited
Loss Contingencies [Line Items]
Ownership percentage					50.00%
Nui Phao Mining Company
Loss Contingencies [Line Items]
Damages awarded		$ 95.0
Damages sought		$ 70.0
Litigation settlement amount awarded to other party	$ 130.0
JKC Australia L N G Pty Limited | Pending Litigation
Loss Contingencies [Line Items]
Damages sought			$ 1,700.0
Kingston Power Plant of the TVA, Primary Case Greg Adkisson, ET AL v. Jacobs Engineering Group Inc.
Loss Contingencies [Line Items]
Number of cases | case				6
Kingston Power Plant of the TVA, Secondary Case No. 3:13CV-505-TAV-HBG
Loss Contingencies [Line Items]
Number of cases | case				10
Joint Venture | JKC Australia L N G Pty Limited | Pending Litigation
Loss Contingencies [Line Items]
Damages sought			$ 530.0

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