Weighted Average Number of Shares Outstanding Basic and Diluted [Line Items]

No definition available.

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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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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

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- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References

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- Definition

Number of shares that have been repurchased and retired during the period.

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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

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References

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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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- References

No definition available.

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Earnings Per Share (Details) - shares	3 Months Ended						9 Months Ended
Earnings Per Share (Details) - shares	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Weighted Average Number of Shares Outstanding Basic and Diluted [Line Items]
Common Stock, Shares, Outstanding	97,200,000			102,700,000			97,200,000	102,700,000
Stock Repurchased and Retired During Period, Shares	2,258,645	3,443,904	1,260,163	1,961,006	3,272,480	760,473	7,000,000.0	6,000,000.0
Treasury Stock, Shares, Acquired							500,000	600,000
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average number of common shares outstanding - basic	97,600,000			103,800,000			100,400,000	105,600,000
Weighted-average number of common shares outstanding - diluted	98,900,000			105,900,000			101,900,000	107,900,000
Potentially dilutive shares excluded from computation of dilutive earnings per share	5,000,000.0			3,800,000			4,700,000	3,600,000
Stock options
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Incremental Common Shares Attributable to Share-based Payment Arrangements	400,000			1,100,000			400,000	1,100,000
Restricted stock units
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Incremental Common Shares Attributable to Share-based Payment Arrangements	900,000			1,000,000.0			1,100,000	1,200,000