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Investments In and Advances To Affiliates (Tables)
3 Months Ended
Mar. 31, 2021
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]  
Investments In and Advances to Affiliates Financial Information The following table summarizes financial information of the Company’s 50%-or-less-owned affiliates that are accounted for using the equity method (in millions):
 Three Months Ended March 31,
Three Months Ended March 31,20212020
Revenue$506 $370 
Operating margin (loss)32 55 
Net loss(17)(11)