Stockholders' Equity - Common Stock Narrative (Details) - USD ($)	3 Months Ended	6 Months Ended
	Dec. 31, 2019	Jun. 30, 2019	Feb. 28, 2019
Equity, Class of Treasury Stock [Line Items]
Sale of shares (in shares)		4,384,045
Equity Shelf Program
Equity, Class of Treasury Stock [Line Items]
Aggregate amount of common stock offered to sell			$ 1,500,000,000
Remaining capacity		$ 1,360,820,000
Equity Shelf Program | Scenario, Forecast
Equity, Class of Treasury Stock [Line Items]
Sale of shares (in shares)	2,194,575