Stockholders Equity - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended				1 Months Ended	12 Months Ended		1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended
	Aug. 31, 2012	Sep. 27, 2013	Sep. 28, 2012	Sep. 30, 2011	Feb. 28, 2011	Mar. 31, 2011 August Two Thousand Ten Repurchase Agreement	Sep. 27, 2013 August Two Thousand Ten Repurchase Agreement	Aug. 24, 2010 August Two Thousand Ten Repurchase Agreement	Jun. 30, 2011 February 2011 Repurchase Agreement	Sep. 27, 2013 February 2011 Repurchase Agreement	Sep. 30, 2011 February 2011 Repurchase Agreement	Feb. 23, 2011 February 2011 Repurchase Agreement	Feb. 29, 2012 August 2011 Repurchase Agreement	Sep. 27, 2013 August 2011 Repurchase Agreement	Aug. 25, 2011 August 2011 Repurchase Agreement	Sep. 28, 2012 Expired
Shareholders Equity [Line Items]
Common stock repurchased, shares		6,000,000	4,433,718	9,028,033
Aggregate cash payments for accelerated share repurchase agreements and for shares repurchased in open market		$ 424	$ 257	$ 611
Repurchase agreement, amount paid								225				280			250
Repurchase agreement, shares received								3,888,249				3,547,474			3,849,638
Percentage of shares delivered by BofA upon execution of repurchase agreement								90.00%				85.00%			85.00%
Cash payment upon settlement recorded as an equity forward contract						26.1
Remaining initial cash payment recorded as an equity forward contract							22.5			42.0				37.5
Percentage of initial cash payment recorded as an equity forward contract							10.00%			15.00%				15.00%
VMS common stock received upon settlement									630,921				375,449
Value of VMS common stock received upon settlement											$ 41.3			$ 25.0
Number of shares authorized to be repurchased by VMS Board of Directors	8,000,000				12,000,000
Number of shares remain available for repurchase		2,000,000														3,000,000
Common stock repurchase period	September 29, 2012 through December 31, 2013