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Equity - ATM Program (Details) - USD ($)
1 Months Ended 12 Months Ended
Feb. 12, 2020
Dec. 31, 2019
Nov. 30, 2019
Feb. 28, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Subsidiary or Equity Method Investee [Line Items]                
Forward rate per share (in usd per share)           $ 31.84    
Issuance of common stock, net           $ 791,048,000 $ 215,179,000 $ 27,353,000
Forward Equity Offering                
Subsidiary or Equity Method Investee [Line Items]                
Issuance of common stock, net (in shares)         0 15,300,000    
Forward rate per share (in usd per share)         $ 28.60 $ 30.91    
Issuance of common stock, net   $ 422,000,000            
Maximum shares issuable under forward equity sales agreement (in shares)     15,600,000   15,300,000 15,300,000    
Forward contract, outstanding (in shares)   15,600,000       15,600,000    
Forward rate per share (in usd per share)   $ 31.56       $ 31.56    
Aggregate amount remaining           $ 163,000,000    
Option indexed to issuers equity, term         1 year 1 year    
At-The-Market Program                
Subsidiary or Equity Method Investee [Line Items]                
Issuance of common stock, net (in shares)             5,400,000  
Sale of stock (in usd per share)         $ 28.27   $ 28.27  
Proceeds from issuance of common stock             $ 154,000,000  
Aggregate amount authorized       $ 1,000,000,000.0        
Issuance of common stock, net           $ 171,000,000    
Settlement alternatives, fair value (in shares)   5,500,000       5,500,000    
Forward contract, outstanding (in shares)   14,800,000       14,800,000    
2019 ATM Program                
Subsidiary or Equity Method Investee [Line Items]                
Forward rate per share (in usd per share)           $ 31.44    
Maximum shares issuable under forward equity sales agreement (in shares)           20,300,000    
Settlement alternatives, fair value (in shares)   5,500,000       5,500,000    
Forward contract, outstanding (in shares)   14,800,000       14,800,000    
Common Stock                
Subsidiary or Equity Method Investee [Line Items]                
Issuance of common stock, net (in shares)           5,900,000    
Issuance of common stock, net           $ 189,000,000    
Common Stock | Forward Equity Offering                
Subsidiary or Equity Method Investee [Line Items]                
Issuance of common stock, net (in shares)         2,000,000,000,000      
Sale of stock (in usd per share)         $ 28.60   $ 28.60  
Proceeds from issuance of common stock         $ 57,000,000      
Subsequent Event | At-The-Market Program                
Subsidiary or Equity Method Investee [Line Items]                
Issuance of common stock, net (in shares) 2,000,000.0              
Sale of stock (in usd per share) $ 35.23