SEGMENT AND RELATED INFORMATION (DETAILS 2) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jul. 04, 2014		Jun. 28, 2013		Jul. 04, 2014		Jun. 28, 2013
Segment reporting other significant reconciling item [Line Items]
URS operating income (loss)	$ 118		$ 130		$ 193		$ 268
Noncontrolling interests	20		15		32		30
Operating income (loss)	138		145		225		298
Corporate [Member]
Segment reporting other significant reconciling item [Line Items]
URS operating income (loss)	(27)	[1]	(23)	[1]	(49)	[1]	(46)	[1]
Operating income (loss)	(27)	[1]	(23)	[1]	(49)	[1]	(46)	[1]
Infrastructure and Environment [Member] | Operating Segments [Member]
Segment reporting other significant reconciling item [Line Items]
URS operating income (loss)	52	[2]	60	[2]	87	[2]	99	[2]
Noncontrolling interests							1
Operating income (loss)	52		60		87		100
Federal Services [Member] | Operating Segments [Member]
Segment reporting other significant reconciling item [Line Items]
URS operating income (loss)	79	[2]	76	[2]	126	[2]	180	[2]
Noncontrolling interests	16		13		26		24
Operating income (loss)	95		89		152		204
Energy and Construction [Member] | Operating Segments [Member]
Segment reporting other significant reconciling item [Line Items]
URS operating income (loss)	12	[2]	19	[2]	16	[2]	27	[2]
Noncontrolling interests	4		2		6		6
Operating income (loss)	16		21		22		33
Oil and Gas [Member] | Operating Segments [Member]
Segment reporting other significant reconciling item [Line Items]
URS operating income (loss)	2	[2]	(2)	[2]	13	[2]	8	[2]
Noncontrolling interests							(1)
Operating income (loss)	$ 2		$ (2)		$ 13		$ 7

[1] Corporate includes expenses related to corporate functions and acquisition-related expenses.

[2] We are providing information regarding URS operating income (loss) by segment because management uses this information to assess performance and make decisions about resource allocation. URS operating income is defined as segment operating income after reductions for pre-tax noncontrolling interests.