STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Operating Activities
Net income	$ 223,000,000.0	$ 152,200,000	$ 252,400,000
Depreciation and Amortization of PP&E and Software	69,800,000	72,400,000	89,600,000
Adjustments to reconcile net income to net cash, cash equivalents and restricted cash provided by operating activities:
Acquisition-related intangible asset amortization	109,000,000.0	122,400,000	106,900,000
Amortization of Debt Issuance Costs and Discounts	4,000,000.0	7,100,000	7,400,000
Gain (Loss) on Extinguishment of Debt, not included in Net Income		(3,300,000)
Loss on extinguishment of debt	15,600,000	3,000,000.0	0
Benefit for deferred income taxes	(19,000,000.0)	(18,800,000)	(84,800,000)
Loss on disposal of property, equipment, intangible assets, and impairments	2,700,000	3,400,000	2,700,000
Stock compensation	38,400,000	34,400,000	28,100,000
Other Operating Activities, Cash Flow Statement	27,100,000	28,300,000	34,100,000
Change in working capital excluding cash, current debt, acquisitions and dispositions:
Trade accounts receivable	71,300,000	(62,300,000)	(7,700,000)
Inventories	(91,800,000)	(900,000)	(18,700,000)
Other current assets	(14,800,000)	15,700,000	(29,400,000)
Trade accounts payable	24,000,000.0	13,200,000	12,500,000
Accrued expenses and other liabilities	15,400,000	28,800,000	(1,600,000)
Increase (Decrease) in Other Noncurrent Assets and Liabilities, Net	7,000,000.0	2,500,000	3,700,000
Net cash, cash equivalents and restricted cash provided by operating activities	481,700,000	401,400,000	395,200,000
Investing Activities
Purchases of property, plant, equipment and software	(105,900,000)	(73,400,000)	(89,500,000)
Proceeds on sale of property and equipment	2,500,000	2,900,000	4,200,000
Payments for acquisition of intangible assets	(28,400,000)	303,400,000	0
Payments to Acquire Intangible Assets	0	(17,100,000)	0
Payments to Acquire Investments	0	(26,600,000)	0
Proceeds on sale of businesses	800,000	166,600,000	1,000,000.0
Other investing activities	200,000	2,000,000.0	(1,900,000)
Net cash, cash equivalents and restricted cash used in investing activities	(131,200,000)	(249,000,000.0)	(82,400,000)
Financing Activities
Proceeds from borrowing on long-term debt	0	1,000,000,000.0	1,000,000.0
Payments of long-term debt	(50,100,000)	(1,038,500,000)	(351,000,000.0)
Proceeds from Lines of Credit	190,000,000.0	420,000,000.0	75,000,000.0
Repayments of Lines of Credit	(270,000,000.0)	(340,000,000.0)	(165,000,000.0)
Payments on Revolving Credit Facility	17,700,000	5,500,000	71,600,000
Borrowings on Securitization Facility	(45,500,000)	(5,500,000)	(40,700,000)
Borrowings on Note Securitization Facility	32,600,000	68,900,000	122,400,000
Payments on Note Securitization Facility	(21,200,000)	(62,700,000)	50,000,000.0
Proceeds from Issuance of Unsecured Debt	0	425,000,000.0	0
Payment of debt issuance costs	0	(12,700,000)	(400,000)
Costs incurred related to amendment of facility	(12,200,000)	0	0
Repayments of Senior Debt	(425,000,000.0)	0	0
Cash dividends	(58,000,000.0)	(55,400,000)	(51,800,000)
Proceeds on exercise of stock options	8,600,000	14,500,000	40,000,000.0
Payment, Tax Withholding, Share-based Payment Arrangement	(16,500,000)	(4,700,000)	(14,100,000)
Stock repurchases for stock award withholding obligations	(54,100,000)	(117,200,000)	0
Other financing activities	8,700,000	7,500,000	6,400,000
Net cash, cash equivalents and restricted cash (used in) provided by financing activities	(695,000,000.0)	304,700,000	(356,600,000)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	7,200,000	(6,300,000)	(5,000,000.0)
Net Cash Flows	(337,300,000)	450,800,000	(48,800,000)
Cash, Cash Equivalents and Restricted Cash:
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	296,500,000	633,800,000	183,000,000.0
Gain (Loss) on Sale of Assets and Asset Impairment Charges	$ (2,700,000)	$ (3,400,000)	$ (2,700,000)