XML 210 R158.htm IDEA: XBRL DOCUMENT v3.21.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Sep. 05, 2018
Apr. 06, 2018
Apr. 30, 2011
Dec. 31, 2020
Disclosure of Income Taxes [Line Items]        
pre-tax income       $ 3,165
Prior year tax loss carryforwards value       $ 557
Increase in tax to be paid     $ 27  
Income tax return 2012 [member]        
Disclosure of Income Taxes [Line Items]        
Income tax penalty imposed   $ 36    
Income tax return 2011 [member]        
Disclosure of Income Taxes [Line Items]        
Income tax penalty imposed $ 25