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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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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

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

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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 Incentive Plan (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Nov. 16, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares exercised			27,615	580,950
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		5,576,490	6,711,731	6,347,709	6,815,278
Restricted stock \| Vest ratably in five years or less [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option award vesting period, in years		3 years
Number of restricted stock awards, granted		6,057,602
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock awards, granted		9,850,443
Long Term Incentive Plan 2003
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares exercised	6,757,640
Common stock shares reserved for issuance to employees	13,535,627
Total unrecognized compensation expense, net of estimated forfeitures		$ 143.1
Weighted-average period over which total unrecognized compensation expense expected to be recognized (years)		1 year 8 months 12 days
Intrinsic value of stock-based awards exercised and restricted stock units converted		$ 78.1	$ 20.9
Long Term Incentive Plan 2003 \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option award expiration period, in years		10 years
Average remaining contractual term for options outstanding, in years		4 years 7 months 6 days
Average remaining contractual term for options vested and expected to vest, in years		4 years 7 months 6 days
Average remaining contractual term for options exercisable, in years		4 years 2 months 12 days
Long Term Incentive Plan 2003 \| Minimum \| Stock options
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 \| Maximum \| Stock options
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]
Amount of common stock shares authorized	72,500,000
2014 Program \| Stock appreciation rights and performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option award vesting period, in years		5 years
Not subject to market conditions \| Performance Shares \| Vest after three years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock awards, granted		587,025
Subject to Market Conditions \| Performance Shares \| Vest after three years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option award vesting period, in years		3 years
Number of restricted stock awards, granted		3,205,816