Represents the high end of the range of the weighted average period between the balance sheet date and the expiration for all awards outstanding under the plan, which may be expressed in a decimal value for the number of years in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Stock Plans (Details 2) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Compensation expense
Excess tax benefit from share-based payment	$ 748,000	$ 1,754,000	$ 1,254,000
Employee Stock Option [Member]
Options Outstanding
Number outstanding as of end of period (in shares)	1.6
Weighted Average Remaining Contractual Life	4 years 8 months 9 days
Weighted Average Exercise Price (in dollars per share)	$ 27.69
Aggregate Intrinsic Value (in millions)	8,500,000
Options Exercisable
Number Exercisable at the end of the period (in shares)	0.9
Weighted Average Remaining Contractual Life	1 year 7 months 24 days
Weighted Average Exercise Price (in dollars per share)	$ 25.16
Stock Incentive Plans, additional disclosures
Remaining contractual life of options outstanding, low end of range	11 days
Remaining contractual life of options outstanding, high end of range	9 years 5 months 5 days
Aggregate intrinsic value of stock options exercised	4,300,000	7,900,000	3,900,000
Compensation expense
Weighted average grant-date fair value of stock options granted (in dollars per share)	$ 7.83
Excess tax benefit from share-based payment	700,000	1,800,000	1,300,000
Performance Earnings Program [Member]
Compensation expense
Unrecognized compensation expense	62,400,000
Period of recognition of unrecognized compensation expense	3 years
Weighted average grant-date fair value of stock options granted (in dollars per share)	$ 29.32	$ 22.27	$ 20.58
Performance period over which objectives must be met to qualify for an award grant	3 years
Restricted Stock Units (RSUs) [Member]
Compensation expense
Recognized compensation expense	34,400,000	32,600,000	26,600,000
Weighted average grant-date fair value of stock options granted (in dollars per share)	$ 29.60	$ 22.83	$ 20.62
Exercise Price Range from Dollars 21.01 to Dollars 23.94 [Member]
Information concerning outstanding and exercisable options
Exercise price, low end of range (in dollars per share)	$ 21.01
Exercise price, high end of range (in dollars per share)	$ 23.94
Exercise Price Range from Dollars 21.01 to Dollars 23.94 [Member] \| Employee Stock Option [Member]
Options Outstanding
Number outstanding as of end of period (in shares)	0.4
Weighted Average Remaining Contractual Life	1 year 2 months 5 days
Weighted Average Exercise Price (in dollars per share)	$ 23.46
Aggregate Intrinsic Value (in millions)	4,100,000
Options Exercisable
Number Exercisable at the end of the period (in shares)	0.4
Weighted Average Remaining Contractual Life	1 year 2 months 5 days
Weighted Average Exercise Price (in dollars per share)	$ 23.46
Exercise Price Range from Dollars 24.45 to Dollars 26.47 [Member]
Information concerning outstanding and exercisable options
Exercise price, low end of range (in dollars per share)	$ 24.45
Exercise price, high end of range (in dollars per share)	$ 28.67
Exercise Price Range from Dollars 24.45 to Dollars 26.47 [Member] \| Employee Stock Option [Member]
Options Outstanding
Number outstanding as of end of period (in shares)	0.5
Weighted Average Remaining Contractual Life	2 years 22 days
Weighted Average Exercise Price (in dollars per share)	$ 26.24
Aggregate Intrinsic Value (in millions)	3,600,000
Options Exercisable
Number Exercisable at the end of the period (in shares)	0.5
Weighted Average Remaining Contractual Life	2 years 22 days
Weighted Average Exercise Price (in dollars per share)	$ 26.24
Exercise Price Range from Dollars 30.96 to Dollars 34.00 [Member]
Information concerning outstanding and exercisable options
Exercise price, low end of range (in dollars per share)	$ 30.96
Exercise price, high end of range (in dollars per share)	$ 34.00
Exercise Price Range from Dollars 30.96 to Dollars 34.00 [Member] \| Employee Stock Option [Member]
Options Outstanding
Number outstanding as of end of period (in shares)	0.7
Weighted Average Remaining Contractual Life	9 years 2 months 1 day
Weighted Average Exercise Price (in dollars per share)	$ 31.65
Aggregate Intrinsic Value (in millions)	$ 800,000
Options Exercisable
Weighted Average Remaining Contractual Life	7 months 28 days
Weighted Average Exercise Price (in dollars per share)	$ 32.53