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RELATED PARTY TRANSACTIONS (Tables)
 12 Months Ended
Dec. 31, 2020
Related Party Transactions [Abstract]  
Financial Data Resulting from Transactions with Related Parties, Income Statement Data
The following table presents Income Statement data resulting from transactions with these related parties. This table does not include our Financial Statement captions with insignificant related party activity.
($ in millions)202020192018
Cost reimbursement revenue$107 $233 $332 
Reimbursed expenses(110)(236)(337)
Equity in (losses) earnings(141)13 103 
Summarized Information for the Entities Equity Method Investments, Income Statement
The following tables present summarized financial information for the entities in which we have equity method investments:
($ in millions)202020192018
Sales$259 $815 $932 
Net (loss) income(212)80 221 
Summarized Information for the Entities Equity Method Investments, Balance Sheet
($ in millions)At Year-End 2020At Year-End 2019
Assets (primarily composed of hotel real estate managed by us)$2,348 $2,555 
Liabilities1,623 1,691