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- Definition

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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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Amount of noncash expense for share-based payment arrangement.

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

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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Percentage of vesting of award under share-based payment arrangement.

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COMMON SHARE-BASED COMPENSATION - Narrative (Details) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) award $ / shares	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2021 USD ($) $ / shares	May 31, 2016 shares	May 31, 2010 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common share-based compensation expense	$ 114.6	$ 106.2	$ 140.1
Income tax benefit from share-based compensation agreements	$ 17.4	21.7	30.0
Number of award categories \| award	2
Fair value of vested shares	$ 101.4	$ 141.8	$ 187.9
Weighted average fair value of shares granted (in USD per share) \| $ / shares	$ 17.53	$ 21.23	$ 22.61
Unrecognized compensation cost related to non-vested shares	$ 121.4
Weighted average non-vested shares compensation cost expected to recognize	2 years 5 months 8 days
2016 GEIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under share awards plan (shares) \| shares				16.0
2010 GEIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized under share awards plan (shares) \| shares					8.5
Performance-vested awards \| Award Date February 2021 \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proportional vesting rate (percent)	0.00%
Performance-vested awards \| Award Date February 2021 \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proportional vesting rate (percent)	150.00%
Performance-vested awards \| Award Date February 2022 \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proportional vesting rate (percent)	0.00%
Performance-vested awards \| Award Date February 2022 \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proportional vesting rate (percent)	150.00%
Performance-vested awards \| Award Date February 2023 \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proportional vesting rate (percent)	0.00%
Performance-vested awards \| Award Date February 2023 \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proportional vesting rate (percent)	150.00%