Stockholders' Equity - Reconciliation of Denominators used in Computation of Basic and Diluted Earnings Per Share (Details) - shares	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Stockholders' Equity Note [Abstract]
Basic weighted average shares outstanding (in shares)	573,197,303	573,159,138	573,550,730	572,669,693
Weighted shares assumed upon exercise of stock options (in shares)	1,754,697	1,392,211	1,577,540	1,105,366
Diluted weighted average shares outstanding (in shares)	574,952,000	574,551,349	575,128,270	573,775,059

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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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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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.

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