Shareholders' Equity - Schedule of Common Stock Outstanding (Details) - shares				12 Months Ended
	Nov. 19, 2019	Jun. 28, 2019	Feb. 05, 2018	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance				404,729,616	300,278,938
Stock issued during period (in shares)	34,500,000		69,575,000
Ending balance				461,004,742	404,729,616
Additional shares subject to forward sale (in shares)		65,000,000		65,000,000
IPO
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued during period (in shares)				0	69,575,000
Follow-On Offerings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued during period (in shares)				50,000,000	34,500,000
ATM Stock Offering Program
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued during period (in shares)				6,107,633	0
Stock Incentive Plan
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued during period (in shares)				167,493	375,678
Performance-Based Stock Incentive Plan
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Units, Options Issued During the Period, Shares				157,512	133,491