Employee Benefit Plans - Changes in Benefit Obligations Plan Assets Funded Status and Reconciliation of Funded Status to Amounts Recognized in Consolidated Balance Sheets and in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension
Change in benefit obligation
Benefit obligation at January 1	$ 132	$ 136
Service cost	7	8	$ 9
Interest cost	3	3	3
Plan participant contributions	1	1
Actuarial loss (gain)	24	(5)
Benefits paid	(10)	(2)
Curtailment	(1)	(1)
Settlement	(6)	(4)
Currency translation adjustments	(1)	(4)
Benefit obligation at December 31	149	132	136
Change in plan assets
Fair value of plan assets at January 1	68	75
Actual return on plan assets	10	(2)
Company contributions	6	5
Benefits paid	(10)	(2)
Currency translation adjustments	0	(1)
Plan participant contribution	1	1
Settlements	(6)	(4)
Other	0	(4)
Fair value of plan assets at December 31	69	68	75
Funded status (underfunded)	(80)	(64)
Amounts Recognized in the Consolidated Balance Sheet
Non-current assets	6	5
Current liabilities	(1)	(1)
Non-current liabilities	(85)	(68)
Net amounts recognized	(80)	(64)
Amounts Recognized in Accumulated Other Comprehensive (Loss) Income
Unrecognized Net actuarial loss	30	16
Unrecognized Prior service cost	0	0
Total	30	16
Postemployment
Change in benefit obligation
Benefit obligation at January 1	54	47
Service cost	11	8	7
Interest cost	1	1	1
Plan participant contributions	0	0
Actuarial loss (gain)	21	12
Benefits paid	(26)	(14)
Curtailment	0	0
Settlement	0	0
Currency translation adjustments	0	0
Benefit obligation at December 31	61	54	$ 47
Change in plan assets
Fair value of plan assets at January 1	0
Actual return on plan assets	0	0
Company contributions	0	0
Benefits paid	0	0
Currency translation adjustments	0	0
Plan participant contribution	0	0
Settlements	0	0
Other	0	0
Fair value of plan assets at December 31	0	0
Funded status (underfunded)	(61)	(54)
Amounts Recognized in the Consolidated Balance Sheet
Non-current assets	0	0
Amounts Recognized in the Consolidated Balance Sheet
Current liabilities	(10)	(9)
Non-current liabilities	(51)	(45)
Net amounts recognized	(61)	(54)
Amounts Recognized in Accumulated Other Comprehensive (Loss) Income
Unrecognized Net actuarial loss	61	44
Unrecognized Prior service cost	2	3
Total	$ 63	$ 47