Equity Award Plans - Summary of Cumulative Minimum, Target and Maximum Restricted Stock Units Award Activity (Details) (Executive Officer, Restricted Stock Units (RSUs))	May 02, 2015
2015 Awards | Performance Period February 2, 2015 to January 28, 2017
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Minimum cumulative restricted stock units available for future declaration	23,253
Target cumulative restricted stock units available for future declaration	46,504
Maximum cumulative restricted stock units available for future declaration	69,757
2014 Awards | Performance Period October 1, 2013 to September 30, 2016
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Minimum cumulative restricted stock units available for future declaration	15,113
Target cumulative restricted stock units available for future declaration	30,224
Maximum cumulative restricted stock units available for future declaration	45,337
2013 Awards | Performance Period October 1, 2012 to September 30, 2015
Deferred Compensation Arrangement With Individual Share Based Payments [Line Items]
Minimum cumulative restricted stock units available for future declaration	18,541
Target cumulative restricted stock units available for future declaration	37,080
Maximum cumulative restricted stock units available for future declaration	55,621