Summary of Changes to Restructuring-Related Liabilities (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Balance, beginning	$ 2	$ 4	$ 6
Restructuring expense	(80)	(22)	(63)
Balance, ending	6	2	4
Americas
Restructuring Cost and Reserve [Line Items]
Balance, beginning	0	1	1
Balance, ending	2	0	1
International
Restructuring Cost and Reserve [Line Items]
Balance, beginning	2	3	5
Balance, ending	4	2	3
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning	1	4	5
Balance, ending	3	1	4
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning	0	0	1
Balance, ending	1	0	0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Balance, beginning	1	0	0
Balance, ending	2	1	0
2014 T15 Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(1)
Cash payment/utilization		(1)	(3)
2014 T15 Restructuring [Member] | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0
Cash payment/utilization		0	(1)
2014 T15 Restructuring [Member] | International
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(1)
Cash payment/utilization		(1)	(2)
2014 T15 Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(1)
Cash payment/utilization		(1)	(3)
2014 T15 Restructuring [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0
Cash payment/utilization		0	0
2014 T15 Restructuring [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0
Cash payment/utilization		0	0
T19 Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(55)
Cash payment/utilization	(51)
T19 Restructuring [Member] | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(39)
Cash payment/utilization	(38)
T19 Restructuring [Member] | International
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(16)
Cash payment/utilization	(13)
T19 Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(24)
Cash payment/utilization	(21)
T19 Restructuring [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	0
Cash payment/utilization	0
T19 Restructuring [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(31)
Cash payment/utilization	(30)
Brazil Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(7)
Cash payment/utilization	(6)
Brazil Restructuring [Member] | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(7)
Cash payment/utilization	(6)
Brazil Restructuring [Member] | International
Restructuring Cost and Reserve [Line Items]
Restructuring expense	0
Cash payment/utilization	0
Brazil Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(1)
Cash payment/utilization	(1)
Brazil Restructuring [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(1)
Cash payment/utilization	0
Brazil Restructuring [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	(5)
Cash payment/utilization	(5)
2018 Truck Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(5)	(5)
Cash payment/utilization		(5)	(5)
2018 Truck Restructuring [Member] | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(5)	(5)
Cash payment/utilization		(5)	(5)
2018 Truck Restructuring [Member] | International
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0	0
Cash payment/utilization		0	0
2018 Truck Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(1)	(1)
Cash payment/utilization		(1)	(1)
2018 Truck Restructuring [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0	0
Cash payment/utilization		0	0
2018 Truck Restructuring [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(4)	(4)
Cash payment/utilization		(4)	(4)
Workforce Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(13)
Cash payment/utilization	(1)	(12)
Workforce Restructuring [Member] | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(4)
Cash payment/utilization	0	(4)
Workforce Restructuring [Member] | International
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(9)
Cash payment/utilization	(1)	(8)
Workforce Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(11)
Cash payment/utilization	(1)	(11)
Workforce Restructuring [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0
Cash payment/utilization	0	0
Workforce Restructuring [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(2)
Cash payment/utilization	$ 0	(1)
T17 Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(2)	(35)
Cash payment/utilization		(5)	(33)
T17 Restructuring [Member] | Americas
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(2)	(25)
Cash payment/utilization		(3)	(24)
T17 Restructuring [Member] | International
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0	(10)
Cash payment/utilization		(2)	(9)
T17 Restructuring [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0	(20)
Cash payment/utilization		(3)	(17)
T17 Restructuring [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		0	0
Cash payment/utilization		0	(1)
T17 Restructuring [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense		(2)	(15)
Cash payment/utilization		$ (2)	(15)
2015 Acquisition Integration [Member]
Restructuring Cost and Reserve [Line Items]
Cash payment/utilization			(1)
2015 Acquisition Integration [Member] | Americas
Restructuring Cost and Reserve [Line Items]
Cash payment/utilization			0
2015 Acquisition Integration [Member] | International
Restructuring Cost and Reserve [Line Items]
Cash payment/utilization			(1)
2015 Acquisition Integration [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Cash payment/utilization			(1)
2015 Acquisition Integration [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Cash payment/utilization			0
2015 Acquisition Integration [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Cash payment/utilization			$ 0