v3.24.2.u1
Restructuring (Summary of Accrued Expenses Balance) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2024
Jan. 01, 2024
Restructuring Cost and Reserve [Line Items]        
Restructuring Reserve $ 40,000,000 $ 39,000,000 $ 40,000,000 $ 59,000,000
Restructuring and Related Cost, Incurred Cost 57,000,000 44,000,000 101,000,000  
Payments for Restructuring (56,000,000) (63,000,000)    
Restructuring Reserve, Accrual Adjustment 0 (1,000,000)    
Special Termination Benefits        
Restructuring Cost and Reserve [Line Items]        
Restructuring Reserve 21,000,000 27,000,000 21,000,000 41,000,000
Restructuring and Related Cost, Incurred Cost (1,000,000) 0    
Payments for Restructuring (5,000,000) (14,000,000)    
Restructuring Reserve, Accrual Adjustment 0 0    
Contract Termination        
Restructuring Cost and Reserve [Line Items]        
Restructuring Reserve 5,000,000 6,000,000 5,000,000 11,000,000
Restructuring and Related Cost, Incurred Cost 0 0    
Payments for Restructuring (1,000,000) (5,000,000)    
Restructuring Reserve, Accrual Adjustment 0 0    
Other Restructuring        
Restructuring Cost and Reserve [Line Items]        
Restructuring Reserve 14,000,000 6,000,000 $ 14,000,000 $ 7,000,000
Restructuring and Related Cost, Incurred Cost 58,000,000 44,000,000    
Payments for Restructuring (50,000,000) (44,000,000)    
Restructuring Reserve, Accrual Adjustment $ 0 $ (1,000,000)