Multiemployer Defined Benefit Pension Plans Year End for Contributions (Detail)	12 Months Ended
	Oct. 31, 2013
Building Service 32BJ Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	6/30/2012 and 6/30/2011
Local 25 SEIU & Participating Employers Pension Trust
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	9/30/2012, 9/30/2011, and 9/30/2010
IUOE Stationary Engineers Local 39 Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	12/31/2012, 12/31/2011, and 12/31/2010
S.E.I.U National Industry Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	12/31/2012
Service Employees International Union Local 32BJ, District 36 Building Operators Pension Trust Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	12/31/2012, 12/31/2011, and 12/31/2010
IUOE Local 30 Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	12/31/2012, 12/31/2011, and 12/31/2010
Massachusetts Service Employees Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	12/31/2012, 12/31/2011, and 12/31/2010	[1]
Building Service Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	4/30/2012, 4/30/2011, and 4/30/2010	[1]
Local Two Hundred and Ten Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	12/31/2012	[1]
Contract Cleaners Service Employees Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	12/31/2012, 12/31/2011, and 12/31/2010	[1]
Local One Thousand One hundred and Two Amalgamated Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	12/31/2012 and 12/31/2011	[1]
Teamsters Local Six Hundred And Seventeen Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions to the plan exceeded more than 5% of total contributions (as of the Plan's year end)	2/29/2012, 2/28/2011, and 2/28/2010	[1]

[1] These plans are not separately listed in our multiemployer table as they represent an insignificant portion of our total multiemployer pension plan contributions.