Condensed Consolidated Statements of Cash Flows (unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020
Details of end of period cash and cash equivalents and restricted cash:
Cash and cash equivalents	$ 766.2	$ 3,777.2
Restricted cash included in other current assets and other assets, net	6.4	7.0
Cash and cash equivalents and restricted cash included in assets held for sale	0.0	3,284.9
Restricted cash included in current assets of discontinued operations	0.7	0.0
Total cash and cash equivalents and restricted cash	$ 773.3	$ 7,069.1

Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Name:	us-gaap_RestrictedCashAndCashEquivalents
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant