Three year performance cycle Payout as a percent of the base award.

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- Definition

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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- Definition

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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- 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).

+ References

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- Definition

Amount of cash paid to settle liability for award under share-based payment arrangement.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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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Expected term of 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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Stock-Based Compensation (Number Of Shares And Related Grant Date Fair Value Of PSU) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date per share fair value (in dollars per share)				$ 14.66
Performance Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares base award (in shares)				0.1
Grant date per share fair value (in dollars per share)				$ 29.31
Risk-free interest rate				4.40%
Vesting period in years				3 years
Expected volatility				45.70%
Expected dividend yield				5.50%
Award Year 2019, PSU - EBIT CAGR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout as a Percent of the Base Award			127.00%
Number of shares distributed (in shares)			0.1
Cash Portion			$ 3.5
Award Year 2020, PSU - EBIT CAGR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout as a Percent of the Base Award		0.00%
Number of shares distributed (in shares)		0.0
Cash Portion		$ 0.0
Award Year 2021, PSU - EBIT CAGR \| Forecast
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout as a Percent of the Base Award	6.00%
Number of shares distributed (in shares)	0.1
Cash Portion	$ 0.1
2023 awards and prior year TSR Based awards \| Performance Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares base award (in shares)					0.1	0.1
Grant date per share fair value (in dollars per share)					$ 41.13	$ 49.43
Risk-free interest rate					1.70%	0.20%
Vesting period in years					3 years	3 years
Expected volatility					45.20%	44.30%
Expected dividend yield					4.60%	3.70%
Prior year EBIT CAGR Based awards \| Performance Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares base award (in shares)				0.0	0.1	0.1
Grant date per share fair value (in dollars per share)				$ 0	$ 32.88	$ 38.77
Vesting period in years				0 years	3 years	3 years