XML 57 R46.htm IDEA: XBRL DOCUMENT v3.21.2
Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items]        
Amortization of Intangible Assets $ 42 $ 41 $ 125 $ 121