XML 49 R33.htm IDEA: XBRL DOCUMENT v3.21.2
Contract Liabilities and Performance Obligations - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]      
Contract liabilities $ 304   $ 244
Revenue recognized from contract with customer $ 156 $ 157