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Earnings Per Common Share - Additional Information (Details) - shares
1 Months Ended 12 Months Ended
Nov. 30, 2019
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Weighted-average incremental shares from forward equity sales agreements (in shares)     2,771,000 0 0
Convertible Units          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive securities excluded from computation of earnings per share (in shares)     28,000,000 15,000,000  
Down R E I T [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive securities excluded from computation of earnings per share (in shares)     7,000,000 2,000,000 7,000,000
Common Stock Options          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive securities excluded from computation of earnings per share (in shares)     1,000,000 1,000,000 1,000,000
2019 ATM Program          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Maximum shares issuable under forward equity sales agreement (in shares)     20,300,000    
Settlement alternatives, fair value (in shares)     5,500,000    
Forward contract, outstanding (in shares)     14,800,000    
Forward Equity Offering          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Maximum shares issuable under forward equity sales agreement (in shares) 15,600,000 15,300,000 15,300,000    
Issuance of common stock, net (in shares)   0 15,300,000    
Forward contract, outstanding (in shares)     15,600,000