Pensions and Other Post-Retirement Benefits - Summary of Pension Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Change in projected benefit obligation
Benefit obligation at beginning of period	$ 1,589	$ 1,862
Service cost	14	17	$ 19
Interest cost	40	50	67
Plan participants’ contributions	2	2
Actuarial (gains) losses	160	(88)
Benefits paid	(60)	(62)
Expenses paid	(3)	(4)
Premiums paid	(1)	(1)
Curtailments	(5)	(3)
Settlements	(8)	(52)
Effect of foreign currency translation	(86)	(132)
Benefit obligation at end of period	1,642	1,589	1,862
Change in plan assets
Fair value of plan assets at beginning of period	1,384	1,574
Actual return on plan assets	96	18
Employer contributions	22	25
Plan participants’ contributions	2	2
Benefits paid	(60)	(62)
Expenses paid	(3)	(4)
Premiums paid	(1)	(1)
Settlements	(8)	(52)
Insurance	4
Effect of foreign currency translation	(71)	(116)
Fair value of plan assets at end of period	1,365	1,384	1,574
Funded status	(277)	(205)
Amounts recognized in the Consolidated Balance Sheets
Pension assets included in other non-current assets	21	22
Current liabilities	(2)	(3)
Accrued benefit liability included in other non-current liabilities	(296)	(224)
Net amount recognized	(277)	(205)
Amounts recognized in Other Comprehensive Income/(Loss), before tax
Net loss/(gain)	102	(60)
Amortization of prior service costs		1
Settlement loss	(2)	(15)
Amortization of net loss	(15)	(23)	(12)
Total recognized in other comprehensive income/(loss)	85	(97)
Amounts not yet reflected in net periodic benefit cost and included in Accumulated Other Comprehensive Income/(Loss), before tax
Unrecognized losses	451	366
The Netherlands
Change in projected benefit obligation
Benefit obligation at beginning of period	639	784
Service cost	5	4	4
Interest cost	11	14	25
Plan participants’ contributions	1	1
Actuarial (gains) losses	67	(53)
Benefits paid	(30)	(29)
Expenses paid	(1)	(2)
Effect of foreign currency translation	(23)	(80)
Benefit obligation at end of period	669	639	784
Change in plan assets
Fair value of plan assets at beginning of period	622	711
Actual return on plan assets	42	9
Employer contributions	7	5
Plan participants’ contributions	1	1
Benefits paid	(30)	(29)
Expenses paid	(1)	(2)
Insurance	4
Effect of foreign currency translation	(20)	(73)
Fair value of plan assets at end of period	625	622	711
Funded status	(44)	(17)
Amounts recognized in the Consolidated Balance Sheets
Accrued benefit liability included in other non-current liabilities	(44)	(17)
Net amount recognized	(44)	(17)
Amounts recognized in Other Comprehensive Income/(Loss), before tax
Net loss/(gain)	39	(54)
Amortization of net loss	(5)	(8)	(5)
Total recognized in other comprehensive income/(loss)	34	(62)
Amounts not yet reflected in net periodic benefit cost and included in Accumulated Other Comprehensive Income/(Loss), before tax
Unrecognized losses	195	161
United States
Change in projected benefit obligation
Benefit obligation at beginning of period	334	380
Service cost			1
Interest cost	13	16	16
Actuarial (gains) losses	10	(4)
Benefits paid	(13)	(12)
Settlements		(46)
Benefit obligation at end of period	344	334	380
Change in plan assets
Fair value of plan assets at beginning of period	231	301
Actual return on plan assets	14	(13)
Employer contributions	1	1
Benefits paid	(13)	(12)
Settlements		(46)
Fair value of plan assets at end of period	233	231	301
Funded status	(111)	(103)
Amounts recognized in the Consolidated Balance Sheets
Current liabilities		(1)
Accrued benefit liability included in other non-current liabilities	(111)	(102)
Net amount recognized	(111)	(103)
Amounts recognized in Other Comprehensive Income/(Loss), before tax
Net loss/(gain)	13	30
Settlement loss		(14)
Amortization of net loss	(6)	(7)	(4)
Total recognized in other comprehensive income/(loss)	7	9
Amounts not yet reflected in net periodic benefit cost and included in Accumulated Other Comprehensive Income/(Loss), before tax
Unrecognized losses	112	105
Other
Change in projected benefit obligation
Benefit obligation at beginning of period	616	698
Service cost	9	13	14
Interest cost	16	20	26
Plan participants’ contributions	1	1
Actuarial (gains) losses	83	(31)
Benefits paid	(17)	(21)
Expenses paid	(2)	(2)
Premiums paid	(1)	(1)
Curtailments	(5)	(3)
Settlements	(8)	(6)
Effect of foreign currency translation	(63)	(52)
Benefit obligation at end of period	629	616	698
Change in plan assets
Fair value of plan assets at beginning of period	531	562
Actual return on plan assets	40	22
Employer contributions	14	19
Plan participants’ contributions	1	1
Benefits paid	(17)	(21)
Expenses paid	(2)	(2)
Premiums paid	(1)	(1)
Settlements	(8)	(6)
Effect of foreign currency translation	(51)	(43)
Fair value of plan assets at end of period	507	531	562
Funded status	(122)	(85)
Amounts recognized in the Consolidated Balance Sheets
Pension assets included in other non-current assets	21	22
Current liabilities	(2)	(2)
Accrued benefit liability included in other non-current liabilities	(141)	(105)
Net amount recognized	(122)	(85)
Amounts recognized in Other Comprehensive Income/(Loss), before tax
Net loss/(gain)	50	(36)
Amortization of prior service costs		1
Settlement loss	(2)	(1)
Amortization of net loss	(4)	(8)	$ (3)
Total recognized in other comprehensive income/(loss)	44	(44)
Amounts not yet reflected in net periodic benefit cost and included in Accumulated Other Comprehensive Income/(Loss), before tax
Unrecognized losses	$ 144	$ 100