CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jul. 04, 2014		Jun. 28, 2013		Jul. 04, 2014		Jun. 28, 2013
Income Statement [Abstract]
Revenues	$ 2,555		$ 2,792		$ 5,092		$ 5,595
Cost of revenues	(2,407)		(2,642)		(4,854)		(5,293)
General and administrative expenses	(27)		(23)		(49)		(46)
Equity in income (loss) of unconsolidated joint ventures	17		18		36		42
Operating income (loss)	138		145		225		298
Interest expense	(18)		(21)		(36)		(42)
Other income (expenses)	1		(3)		(3)		(6)
Income (loss) before income taxes	121		121		186		250
Income tax benefit (expense)	(13)		(39)		(39)		(81)
Net income (loss) including noncontrolling interests	108		82		147		169
Noncontrolling interests in income of consolidated subsidiaries	(20)		(15)		(32)		(30)
Net income (loss) attributable to URS	$ 88		$ 67		$ 115		$ 139
Earnings (loss) per share:
Basic	$ 1.28		$ 0.91		$ 1.64		$ 1.88
Diluted	$ 1.27		$ 0.91		$ 1.63		$ 1.87
Weighted-average shares of common stock outstanding:
Basic	68.3	[1]	73.8	[1]	69.9	[1]	74.1	[1]
Diluted	68.8		74.0		70.5		74.4
Cash dividends declared per share	$ 0.22		$ 0.21		$ 0.44		$ 0.42

[1] Weighted-average shares of common stock outstanding are net of treasury stock and exclude nonvested restricted stock awards.