Income Taxes (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Deferred tax assets:
Compensation and benefit accruals not currently deductible	$ 74.7	$ 77.6
Net operating loss carry forwards	58.1	57.0
Self insurance reserves	54.7	50.2
Research and experimentation and other tax credits	38.3	42.4
Pension liability	58.5	58.7
Accrued liabilities	56.1	86.5
Investments in joint ventures/non-controlled subsidiaries	13.9
State taxes	0.9
Other	4.2	4.0
Total deferred tax assets	359.4	376.4
Deferred tax liabilities:
Unearned revenue	(139.3)	(167.8)
Depreciation and amortization	(20.1)	(18.8)
Acquired intangible assets	(15.8)	(21.4)
State taxes		(3.8)
Investments in joint ventures/non-controlled subsidiaries		(1.6)
Total deferred tax liabilities	(175.2)	(213.4)
Valuation allowance	(20.8)	(19.2)
Net deferred tax assets	163.4	143.8
Net operating loss carry forwards
Tax-deductible goodwill	283.9	306.6
Income Taxes, additional disclosures
Unused Foreign tax credits	16.8
Unused federal research and development credits	1.8
Unused state research and development credits which can be carried forward indefinitely	15.7
California Enterprise Zone Tax Credits which can be carried forward indefinitely	4.1
Net deferred tax asset likely to be realized and for which no additional valuation allowance has been provided	338.6
Additional valuation allowance provided for, net deferred tax asset which is likely to be realized	53.7
Undistributed earnings from non-U.S. subsidiaries	852.2
Liability for unrecognized tax benefits, including potential interest and penalties, net of related tax benefit	60.2	56.3
Unrecognized tax benefits that would be included in the effective tax rate if recognized	33.5
Reconciliation of the beginning and ending amount of gross unrecognized tax benefits
Balance at the beginning of the year	55.8	58.1
Gross increase in prior years' tax positions	7.2	3.7
Gross decrease in prior years' tax positions	(5.6)	(4.4)
Decrease due to settlement with tax authorities	(1.6)	(5.2)
Gross increase in current periods tax positions	3.8	4.9
Lapse of statute of limitations	(5.9)	(1.3)
Balance at the end of the year	53.7	55.8
Accrued interest, excluding any related income tax benefits	7.3	9.6
Accrued penalties, excluding any related income tax benefits	2.7	0.1
Maximum
Net operating loss carry forwards
Period of amortization of goodwill	P15Y
State
Net operating loss carry forwards
Net operating loss carry forwards	255.6
Foreign
Net operating loss carry forwards
Net operating loss carry forwards	$ 216.7