Stockholders' Equity - Reconciliation of Denominators used in Computation of Basic and Diluted Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Stockholders' Equity Note [Abstract]
Basic weighted average shares outstanding (in shares)	574,973,196	573,913,929	574,637,254	573,673,031
Weighted shares assumed upon exercise of stock options (in shares)	2,286,643	2,203,402	2,291,000	1,797,201
Diluted weighted average shares outstanding (in shares)	577,259,839	576,117,331	576,928,254	575,470,232