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Goodwill and Acquired Intangible Assets (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Indefinite-lived Intangible Assets [Line Items]      
Amount of goodwill expected to be deductible for tax purposes $ 35,000,000    
Goodwill, impairment loss 0 $ 0 $ 0
Impairment of indefinite-lived intangible assets 0 0 0
Finite-lived intangible assets, net 1,388,000,000 1,567,000,000  
Impairments of finite-lived intangible assets 0 0 $ 0
Foreign currency translation adjustment      
Indefinite-lived Intangible Assets [Line Items]      
Finite-lived intangible assets, net (89,000,000) (62,000,000)  
Customer Relationships      
Indefinite-lived Intangible Assets [Line Items]      
Finite-lived intangible assets, net $ 1,227,000,000 1,339,000,000  
Impairments of finite-lived intangible assets   $ 14,000,000