Earnings (Loss) Per Share - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	6 Months Ended
	Apr. 21, 2020	Jun. 30, 2020	Jun. 30, 2020	Jun. 15, 2020	Apr. 20, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Number of warrants issuable under agreement (up to)					4,600,000
Number of securities called by warrants (in shares)		4,200,000	4,200,000
Warrant exercise price (in dollars per share)					$ 31.50
Warrant term					5 years
Available borrowing amount under the CARES Act					$ 4,500
Number of warrants issuable if the full amount is borrowed under the CARES Act (in shares)					14,200,000
Par value of common stock (in dollars per share)		$ 0.01	$ 0.01			$ 0.01
Proceeds from the issuance of common stock			$ 1,100
Public Offering
Class of Stock [Line Items]
Number of shares issued (in shares)	39,250,000
Par value of common stock (in dollars per share)	$ 0.01
Sale price (in dollars per share)	$ 26.50
Over-Allotment Option
Class of Stock [Line Items]
Number of shares issued (in shares)	3,925,000
Over-allotment option period	30 days
Equity Distribution Agreement
Class of Stock [Line Items]
Number of shares issued (in shares)		500,000
Sale price (in dollars per share)				$ 41.05
Proceeds from the issuance of common stock		$ 22
Number of shares issuable under Equity Distribution Agreement (up to) (in shares)				28,000,000