Stockholders' Equity Narative (Details) $ / shares in Units, $ in Millions	1 Months Ended
	Apr. 30, 2018 USD ($) shares	Apr. 30, 2019 class $ / shares shares	Jan. 31, 2019 $ / shares shares	Apr. 04, 2018 $ / shares
Equity [Abstract]
Shares authorized (in shares)		20,000,000	20,000,000
Number of classes of stock | class		2
Class of Stock [Line Items]
Shares authorized (in shares)		2,250,000,000	2,250,000,000
Par value per share (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001
Shares issued (in shares)		241,359,000	220,979,000
Closing price of stock (in dollars per share) | $ / shares		$ 22.86
Class A
Class of Stock [Line Items]
Shares authorized (in shares)		2,000,000,000	2,000,000,000
Par value per share (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001
Shares issued (in shares)		252,852,600	243,524,000
Stock Repurchased (in shares)	1,008,573
Stock repurchased and retired during period, value | $	$ 20.0
Closing price of stock (in dollars per share) | $ / shares		$ 22.86		$ 19.83
Class B
Class of Stock [Line Items]
Shares authorized (in shares)		250,000,000	250,000,000
Par value per share (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001
Shares issued (in shares)		0	0