Consolidated Statements of Cash Flows - USD ($) $ in Millions		3 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net income (loss)		$ (220.5)	$ (23.4)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		52.3	63.9
Stock-based compensation		4.9	5.2
Certain interest expense and other financing costs		2.9	2.8
Loss on debt extinguishment		0.0	14.7
Gain on sale of fixed assets and other		(0.6)	(0.3)
Deferred income taxes		(85.9)	2.4
Loss on classification as held for sale	[1]	355.4	0.0
Changes in operating assets and liabilities:
Accounts receivable		149.6	247.6
Inventories		(89.3)	(19.2)
Prepaid expenses and other current assets		18.0	(3.4)
Accounts payable and accrued expenses		(227.5)	(417.5)
Other assets and liabilities		1.6	1.9
Net cash provided by (used in) operating activities		(39.1)	(125.3)
Investing Activities
Purchases of property and equipment		(18.0)	(12.2)
Proceeds from the sale of assets		0.7	0.4
Net cash provided by (used in) investing activities		(17.3)	(11.8)
Financing Activities
Borrowings under revolving lines of credit		2.3	750.7
Payments under revolving lines of credit		(102.3)	(616.8)
Payments under term loan		(2.4)	(2.4)
Borrowings under senior notes		0.0	300.0
Payment under senior notes		0.0	(309.6)
Payment of debt issuance costs		0.0	(3.6)
Payments under equipment financing facilities and finance leases		(1.7)	(2.3)
Payment of dividends on Preferred Stock		(6.0)	(6.0)
Proceeds from issuance of common stock related to equity awards		7.1	0.9
Payment of taxes related to net share settlement of equity awards		(2.8)	(2.1)
Net cash provided by (used in) financing activities		(105.8)	108.8
Effect of exchange rate changes on cash and cash equivalents		(1.0)	(0.3)
Net increase (decrease) in cash and cash equivalents		(163.2)	(28.6)
Cash and cash equivalents, beginning of period		624.6	72.3
Cash and cash equivalents, end of period		461.4	43.7
Supplemental Cash Flow Information
Operating cash flows provided by (used in) discontinued operations		(6.4)	12.4
Investing cash flows provided by (used in) discontinued operations		(2.5)	(6.9)
Cash paid during the period for:
Interest		47.1	57.4
Income taxes paid (received), net of refunds		$ 2.0	$ 0.1

[1] See Note 3 for additional information.