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Earnings Per Share (Details) - shares	3 Months Ended			6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Class of Stock [Line Items]
Anti-dilutive shares (shares)	1,734,610		1,603,198	1,288,003	1,127,885
Weighted average common shares outstanding for basic calculation (shares)	267,249,580		290,565,408	268,233,233	290,562,234
Add: Effect of stock options, deferred stock units and restricted stock units (shares)	10,815		8,745	10,764	8,898
Weighted average common shares outstanding for diluted calculation (shares)	267,260,395		290,574,153	268,243,997	290,571,132
Participating securities (shares)	65,062		59,166	65,062	59,166
Anti-dilutive shares (shares)	1,734,610		1,603,198	1,288,003	1,127,885
Common Stock
Class of Stock [Line Items]
Stock Repurchased and Retired During Period, Shares		3,328,574		3,328,574

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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.

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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.

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

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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.

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