Stockholders' Equity - Narrative (Details) - USD ($)	Mar. 31, 2020	Feb. 28, 2019	Dec. 31, 2018
Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock liquidation preference percentage	4.00%
2018 Program
Class of Stock [Line Items]
Stock repurchase program authorized amount			$ 1,000,000,000
2019 Program
Class of Stock [Line Items]
Stock repurchase program authorized amount		$ 1,500,000,000