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Investments In and Advances To Affiliates (Tables)
6 Months Ended
Jun. 30, 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 and majority-owned unconsolidated subsidiaries that are accounted for using the equity method (in millions):
 50%-or-less Owned AffiliatesMajority-Owned Unconsolidated Subsidiaries
Six Months Ended June 30,2021202020212020
Revenue$726 $939 $$
Operating margin (loss)12 153 (1)(1)
Net income (loss)(93)11 (2)(2)