Restructuring and Other Related Charges (Summary Of Changes To Restructuring-Related Liabilities) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			$ 10
Restructuring expenses	$ 6	$ 22	14	$ 42
Balance at the end of the period	5		5
Personnel
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			7
Balance at the end of the period	2		2
Facility Related
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			2
Balance at the end of the period	2		2
Other
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			1
Balance at the end of the period	1		1
Americas
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			2
Balance at the end of the period	2		2
International
Restructuring Reserve [Roll Forward]
Balance at the beginning of the period			8
Balance at the end of the period	$ 3		3
Cost Optimization
Restructuring Reserve [Roll Forward]
Restructuring expenses			4
Restructuring payment/utilization:			(3)
Cost Optimization | Personnel
Restructuring Reserve [Roll Forward]
Restructuring expenses			4
Restructuring payment/utilization:			(3)
Cost Optimization | Facility Related
Restructuring Reserve [Roll Forward]
Restructuring expenses			0
Restructuring payment/utilization:			0
Cost Optimization | Other
Restructuring Reserve [Roll Forward]
Restructuring expenses			0
Restructuring payment/utilization:			0
Cost Optimization | Americas
Restructuring Reserve [Roll Forward]
Restructuring expenses			1
Restructuring payment/utilization:			(1)
Cost Optimization | International
Restructuring Reserve [Roll Forward]
Restructuring expenses			3
Restructuring payment/utilization:			(2)
T21
Restructuring Reserve [Roll Forward]
Restructuring expenses			3
Restructuring payment/utilization:			(8)
T21 | Personnel
Restructuring Reserve [Roll Forward]
Restructuring expenses			3
Restructuring payment/utilization:			(8)
T21 | Facility Related
Restructuring Reserve [Roll Forward]
Restructuring expenses			0
Restructuring payment/utilization:			0
T21 | Other
Restructuring Reserve [Roll Forward]
Restructuring expenses			0
Restructuring payment/utilization:			0
T21 | Americas
Restructuring Reserve [Roll Forward]
Restructuring expenses			1
Restructuring payment/utilization:			(1)
T21 | International
Restructuring Reserve [Roll Forward]
Restructuring expenses			2
Restructuring payment/utilization:			(7)
2020 Optimization
Restructuring Reserve [Roll Forward]
Restructuring payment/utilization:			(1)
2020 Optimization | Personnel
Restructuring Reserve [Roll Forward]
Restructuring payment/utilization:			(1)
2020 Optimization | Facility Related
Restructuring Reserve [Roll Forward]
Restructuring payment/utilization:			0
2020 Optimization | Other
Restructuring Reserve [Roll Forward]
Restructuring payment/utilization:			0
2020 Optimization | Americas
Restructuring Reserve [Roll Forward]
Restructuring payment/utilization:			0
2020 Optimization | International
Restructuring Reserve [Roll Forward]
Restructuring payment/utilization:			(1)
Brazil
Restructuring Reserve [Roll Forward]
Restructuring expenses			1
Restructuring payment/utilization:			(1)
Brazil | Personnel
Restructuring Reserve [Roll Forward]
Restructuring expenses			0
Restructuring payment/utilization:			0
Brazil | Facility Related
Restructuring Reserve [Roll Forward]
Restructuring expenses			0
Restructuring payment/utilization:			0
Brazil | Other
Restructuring Reserve [Roll Forward]
Restructuring expenses			1
Restructuring payment/utilization:			(1)
Brazil | Americas
Restructuring Reserve [Roll Forward]
Restructuring expenses			1
Restructuring payment/utilization:			(1)
Brazil | International
Restructuring Reserve [Roll Forward]
Restructuring expenses			0
Restructuring payment/utilization:			$ 0