Stockholders Equity - Additional Information (Detail) (USD $)	1 Months Ended			12 Months Ended				12 Months Ended		1 Months Ended
	Nov. 30, 2013	Aug. 31, 2012	Feb. 29, 2012	Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012	Feb. 28, 2011	Sep. 26, 2014 November 2013 Repurchase Program	Sep. 26, 2014 August 2012 Repurchase Program	Aug. 31, 2014 August Two Thousand Fourteen Repurchase Program
Shareholders Equity [Line Items]
Common stock repurchased, shares				7,750,000	6,000,000	4,433,718		5,750,000	2,000,000	0
Aggregate cash payments for accelerated share repurchase agreements and for shares repurchased in open market				$ 624,017,000	$ 423,664,000	$ 257,440,000
Number of shares authorized to be repurchased by VMS Board of Directors	6,000,000	8,000,000					12,000,000			6,000,000
Number of shares remain available for repurchase						3,000,000
Common stock repurchase period	December 30, 2013 through December 31, 2014	September 29, 2012 through December 31, 2013								August 15, 2014 through December 31, 2015
VMS common stock received upon settlement			375,449
Value of VMS common stock received upon settlement				$ 25,000,000
Number of shares remain available for repurchase								250,000