Aggregate number of common shares reserved for future issuance.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Exercises In Period, Total Intrinsic Value And Equity Instruments Other Than Options, Vested In Period, Intrinsic Value

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Share-Based Incentive Plan (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended
	Nov. 16, 2020	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option award expiration period, in years		10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		5,126,329		5,576,490
Long-Term Incentive Plan 2003
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	6,757,640
Total unrecognized compensation expense, net of estimated forfeitures		$ 272.7
Weighted-average period over which total unrecognized compensation expense expected to be recognized, in years		2 years
Intrinsic value of stock-based awards exercised and restricted stock units converted		$ 63.1	$ 30.8
Common Stock, Capital Shares Reserved for Future Issuance	13,535,627
Long-Term Incentive Plan 2003 \| Stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average remaining contractual term for stock awards outstanding, in years		4 years 8 months 12 days
Average remaining contractual term for stock awards vested and expected to vest, in years		4 years 7 months 6 days
Average remaining contractual term for stock awards exercisable, in years		4 years 6 months
Long-Term Incentive Plan 2003 \| Stock awards \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option award vesting period, in years		3 years
Long-Term Incentive Plan 2003 \| Stock awards \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option award vesting period, in years		4 years
2020 Stock Incentive Plan and 2003 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Ordinary shares reserved for issuance	72,500,000