XML 60 R49.htm IDEA: XBRL DOCUMENT v3.20.2
Revenue - Summary of Accounts Receivable, Net of Allowances, Contract Assets and Contract Liabilities from Contracts with Customer (Detail) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues [Abstract]      
Accounts receivable, net of allowances $ 634 $ 730 $ 765
Contract Assets 272 245 240
Contract Liabilities $ 249 $ 193 $ 203