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Investments
 12 Months Ended
Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]  
Investments Investments
($ in millions)20212020
Investments in equity affiliates$126 $120 
Marketable equity securities (See Note 10)98 97 
Other50 50 
Total$274 $267 
Investments in equity affiliates represent PPG’s ownership interests in entities between 20% and 50% that manufacture and sell coatings and certain chemicals.
PPG’s share of undistributed net earnings of equity affiliates was $15 million, $8 million and $11 million in 2021, 2020 and 2019, respectively. Dividends received from equity affiliates were $9 million, $18 million and $15 million in 2021, 2020 and 2019, respectively.