Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Operating Partnership Ownership [Table Text Block]

TRG

At December 31, 2019 and 2018, TRG's equity included two classes of preferred equity (Series J and K Preferred Equity) and the net equity of the TRG unitholders. Net income and distributions of TRG are allocable first to the preferred equity interests, and the remaining amounts to the general and limited partners in TRG in accordance with their percentage ownership. The Series J and K Preferred Equity are owned by TCO and are eliminated in consolidation.

The partnership equity of TRG and TCO's ownership therein are shown below:

Year	TRG Units outstanding at December 31	TRG Units owned by TCO at December 31(1)	TRG Units owned by noncontrolling interests at December 31	TCO's % interest in TRG at December 31	TCO's average interest % in TRG
2019	87,644,651	61,228,579	26,416,072	70%	70%
2018	85,946,862	61,069,108	24,877,754	71	71
2017	85,788,252	60,832,918	24,955,334	71	71

(1) There is a one-for-one relationship between TRG Units owned by TCO and TCO common shares outstanding; amounts in this column are equal to TCO’s common shares outstanding as of the specified dates.

Outstanding voting securities of TCO at December 31, 2019 consisted of 26,398,473 shares of Series B Non-Participating Convertible Preferred Stock (Series B Preferred Shares) (Note 14) and 61,228,579 shares of common stock.

The remaining approximate 30% of TRG Units are owned by TRG’s partners other than TCO, including Robert S. Taubman, William S. Taubman, Gayle Taubman Kalisman, and the A. Alfred Taubman Restated Revocable Trust (Taubman Family).