Commitments and Contingencies (Details) (USD $)		0 Months Ended
	Jun. 27, 2014 Natural Gas Explosion at ConAgra Foods Plant [Member] claim	Jan. 20, 2010 In Arbitration Litigation [Member] Clark County Nevada Against Jacobs Engineering Group, Inc. [Member]	Jan. 20, 2010 In Arbitration Litigation [Member] Clark County Nevada Against Jacobs Engineering Group, Inc. [Member] subsidiary
Loss Contingencies [Line Items]
Number of subsidiaries			2
Third party payment of litigation settlement and awards (more than $60 million)		$ 60,000,000
Number of unsettled personal injury claims remaining	1