Equity - Additional Information (Details) - USD ($)			1 Months Ended		3 Months Ended	12 Months Ended
	Apr. 01, 2019	Mar. 31, 2019	Feb. 28, 2019	Dec. 31, 2018	Mar. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Maximum shares issuable under forward equity sales agreement (in shares)				15,250,000
Forward equity sales agreement, initial net price (in usd per share)				$ 28.60
Common Stock
Class of Stock [Line Items]
Issuance of common stock, net (in shares)				2,000,000
Weighted average net price (in usd per share)		$ 28.60			$ 28.60
Proceeds from issuance of common stock				$ 57,000,000
At-The-Market Program 2018
Class of Stock [Line Items]
ATM aggregate amount authorized			$ 1,000,000,000.0
Issuance of common stock, net (in shares)						5,400,000
Weighted average net price (in usd per share)				$ 28.27		$ 28.27
Proceeds from issuance of common stock						$ 154,000,000
At-The-Market Program 2019
Class of Stock [Line Items]
ATM aggregate amount remaining		$ 888,000,000
Maximum shares issuable under forward equity sales agreement (in shares)					3,600,000
Forward equity sales agreement, initial net price (in usd per share)					$ 31.19
Option indexed to issuers equity, term					1 year
Forward Equity Offering
Class of Stock [Line Items]
Issuance of common stock, net (in shares)					0
Option indexed to issuers equity, term				1 year
Subsequent Event | At-The-Market Program 2019
Class of Stock [Line Items]
Maximum shares issuable under forward equity sales agreement (in shares)	1,500,000
Forward equity sales agreement, initial net price (in usd per share)	$ 30.63
Option indexed to issuers equity, term	1 year