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, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension
Change in benefit obligation
Benefit obligation at January 1	$ 149	$ 132
Service cost	7	7	$ 8
Interest cost	2	3	3
Plan participant contributions	1	1
Actuarial loss	14	24
Benefits paid	(1)	(10)
Curtailment	(5)	(1)
Settlement	(11)	(6)
Plan Amendment	0	0
Currency translation adjustments	8	(1)
Benefit obligation at December 31	164	149	132
Change in plan assets
Fair value of plan assets at January 1	69	68
Actual return on plan assets	4	10
Company contributions	5	6
Benefits paid	(1)	(10)
Currency translation adjustments	5	0
Plan participant contribution	1	1
Settlements	(11)	(6)
Fair value of plan assets at December 31	72	69	68
Funded status (underfunded)	(92)	(80)
Amounts Recognized in the Consolidated Balance Sheet
Non-current assets	8	6
Current liabilities	(2)	(1)
Non-current liabilities	(98)	(85)
Net amounts recognized	(92)	(80)
Amounts Recognized in Accumulated Other Comprehensive Income (Loss)
Unrecognized Net actuarial loss	31	30
Unrecognized Prior service cost	0	0
Total	31	30
Postemployment
Change in benefit obligation
Benefit obligation at January 1	61	54
Service cost	11	11	8
Interest cost	1	1	1
Plan participant contributions	0	0
Actuarial loss	12	21
Benefits paid	(24)	(26)
Curtailment	0	0
Settlement	0	0
Plan Amendment	3	0
Currency translation adjustments	0	0
Benefit obligation at December 31	64	61	54
Change in plan assets
Fair value of plan assets at January 1	0	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
Fair value of plan assets at December 31	0	0	$ 0
Funded status (underfunded)	(64)	(61)
Amounts Recognized in the Consolidated Balance Sheet
Non-current assets	0	0
Amounts Recognized in the Consolidated Balance Sheet
Current liabilities	(10)	(10)
Non-current liabilities	(54)	(51)
Net amounts recognized	(64)	(61)
Amounts Recognized in Accumulated Other Comprehensive Income (Loss)
Unrecognized Net actuarial loss	66	61
Unrecognized Prior service cost	5	2
Total	$ 71	$ 63

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