Summary of Significant Accounting Policies - Fair Value Textual (Details) - USD ($) $ in Millions				1 Months Ended
	Jun. 03, 2013	Apr. 04, 2011	Jun. 30, 2009	Aug. 29, 2014	Oct. 31, 2015	Nov. 01, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and held to maturity investments					$ 76.4	$ 121.3
Maturity date of senior unsecured notes				Aug. 29, 2014
5.0% Senior unsecured notes due July 1, 2014 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate principal amount of debt			$ 375.0
Interest rate to be paid on long term notes			5.00%
Maturity date of senior unsecured notes			Jul. 01, 2014
3.0% Senior unsecured notes due April 15, 2016 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, frequency of periodic payment		semi-annual fixed interest payments due on April 15 and October 15 of each year, commencing
3.0% Senior unsecured notes due April 15, 2016 [Member] | Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value					378.6	386.3
2.875% Senior unsecured notes due June 1, 2023 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Maturity date of senior unsecured notes	Jun. 01, 2023
Debt instrument, frequency of periodic payment	semi-annual fixed interest payments due on June 1 and December 1 of each year, commencing December 1, 2013
2.875% Senior unsecured notes due June 1, 2023 [Member] | Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate principal amount of debt	$ 500.0
Interest rate to be paid on long term notes	2.875%
Long-term debt, fair value					$ 480.9	$ 483.5