Stockholders' Equity - Narrative - General (Details)	12 Months Ended
	Dec. 31, 2017 vote $ / shares shares	Dec. 31, 2018 $ / shares shares
Class of Stock [Line Items]
Common and preferred stock, shares authorized (in shares)		1,100,000,000
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Common stock, votes per share | vote	1
Common Stock [Member]
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	999,999,000	999,999,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01
Convertible Stock [Member]
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	1,000	1,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01