Share Capital - Additional Information (Details)			12 Months Ended
	Jul. 09, 2018 shares	Jul. 05, 2018 shares	Dec. 31, 2019 vote $ / shares shares	Dec. 31, 2018 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized share capital (in shares)			595,000,000
Common stock, shares authorized (in shares)			570,000,000
Common shares, par value (in USD per share) | $ / shares			$ 0.001	$ 0.001
Preferred Stock, shares authorized (in shares)			25,000,000
Preferred Stock, par value (in USD per share) | $ / shares			$ 0.001
Subsidiary redemption, shares issues to redeem outstanding shares		1
Number of votes per common stock | vote			1
Special A Voting Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares, canceled	1
Special B Voting Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares, canceled	1