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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Stockholders' Equity Note [Abstract]
Basic weighted average shares outstanding (in shares)	573,452,002	574,013,820	572,934,475	574,526,758
Weighted shares assumed upon exercise of stock options (in shares)	914,771	512,624	1,042,830	390,058
Diluted weighted average shares outstanding (in shares)	574,366,773	574,526,444	573,977,305	574,916,816