Number Of Transactions With Unaffiliated Entity

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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-Topic 260
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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.

+ References

No definition available.

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- Definition

Face amount or stated value per share of common stock.

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- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

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- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

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- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

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- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

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- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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EARNINGS PER SHARE - (Narrative) (Details) $ / shares in Units, $ in Millions					3 Months Ended	12 Months Ended
	Mar. 31, 2020 shares	Mar. 31, 2020 USD ($)	Mar. 27, 2020 $ / shares shares	Feb. 23, 2018 USD ($) $ / shares shares	Dec. 31, 2020 transaction $ / shares	Dec. 31, 2020 USD ($) transaction $ / shares shares	Dec. 31, 2019 $ / shares shares	Dec. 31, 2018 shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	12,270,900		2,000,000
Common stock, par value (in dollars per share) \| $ / shares			$ 50.00
Sale of stock, consideration received on transaction \| $		$ 593.6
Shares repurchased (in shares)				475,920		496,000
Common stock, par value (in dollars per share) \| $ / shares				$ 0.01	$ 0.01	$ 0.01	$ 0.01
Number of transactions with unaffiliated entity \| transaction					13	13
Treasury stock activity \| $				$ 57.3		$ 53.9
Treasury stock acquired (in dollars per share) \| $ / shares				$ 120.33	$ 108.71
Over-Allotment Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Sale of stock, number of shares issued in transaction (in shares)			300,000
Additional Over-Allotment Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Sale of stock, number of shares issued in transaction (in shares)			270,900
Private Placement
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Sale of stock, number of shares issued in transaction (in shares)			10,000,000
Common stock, par value (in dollars per share) \| $ / shares			$ 50.00
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted earnings per share (in shares)						394,008	379,608	425,908
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted earnings per share (in shares)						271,371	235,894	205,979