Loss Per Share - Additional Information (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares outstanding and trading	249,191,000		249,191,000		246,794,000
Additional shares authorized for issuance			83,100,000
Current nominal value per share (usd per share)	$ 0.01		$ 0.01		$ 0.01
Number of shares allotted			0
Number of shares repurchased	0	0	0	0
Equity option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the diluted net income per share	12,000,000.0	13,200,000	12,000,000	13,200,000