XML 130 R95.htm IDEA: XBRL DOCUMENT v3.22.1
Income taxes - Summary of components of tax expense (income) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Current tax expense      
Current year $ 6 $ 7 $ 6
Changes in estimates related to prior years [1] [1] 2
Total 6 7 8
Origination and reversal of temporary difference (3) (5) (1)
Income tax expense $ 3 $ 2 $ 7
[1] Amount less than $1 million