XML 85 R75.htm IDEA: XBRL DOCUMENT v3.21.1
Restructuring and Other Charges - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]        
Integration activities charges $ 23 $ 48    
Non-cash impairment charge 6      
Accelerated amortization expense included within finance lease expense   38    
Accelerated amortization expense   10    
Employee Severance        
Restructuring Cost and Reserve [Line Items]        
Severance and other separation costs 13 40    
Employee severance and other separation costs accrual 22 44 $ 27 $ 14
Share-based compensation costs $ 4 $ 8