Additional Cash Flow Information (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 7,600.1	$ 6,795.0	$ 6,304.3	$ 5,988.2
Cash, cash equivalents and restricted cash per condensed consolidated statement of cash flows	7,604.0	6,800.1	6,312.9	5,988.9
Prepaid expenses and other current assets
Restricted Cash and Cash Equivalents Items [Line Items]
Prepaid expenses and other current assets	$ 3.9	$ 5.1	$ 8.6	$ 0.7

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