Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified		33 Months Ended
	Mar. 28, 2014 Natural Gas Explosion at ConAgra Foods Plant [Member] claim	Sep. 30, 2012 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
Loss Contingency, Pending Claims, Number	1