Pension Plans, Postretirement and Other Employee Benefits - Summary of Amount Recognised in Balance Sheets for Pension Plans and Postretirement Benefit Plan (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Feb. 29, 2016	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost			$ 6	$ 6	$ 6
Prior period correction		$ 11
Fair value at December 31 of the previous year
Employer contributions	$ 18		37
Fair value at December 31			561
Net actuarial loss			5
Prior service cost			(1)
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent			0	0
Noncurrent liabilities			(273)	(318)
United States Pension Plans of US Entity, Defined Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation at December 31 of the previous year			416	448
Settlement			(1)	(8)
Service cost			1	1
Interest cost			15	17	20
Actuarial (gain)/loss			(7)	(21)
Benefits paid			(152)	(21)
Benefit obligation at December 31		448	272	416	448
Fair value at December 31 of the previous year			304	334
Settlement			(1)
Actual return on plan assets			21	(11)
Employer contributions			20	10
Fair value at December 31		334	192	304	334
Unfunded status at December 31			(80)	(114)
Net actuarial loss			146	232
Prior service cost			0	0
Net amount recognized at December 31			66	118
Current liabilities			(20)	(2)
Noncurrent liabilities			(60)	(112)
Net amount recognized			(80)	(114)
Foreign
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation at December 31 of the previous year			425	483
Currency rate conversion			(38)	(45)
Settlement				(2)
Service cost			8	9
Interest cost			14	15	18
Administrative expenses/taxes paid			(1)	(2)
Plan amendments			(1)	2
Actuarial (gain)/loss			50	(17)
Benefits paid			(20)	(19)
Participants' contributions			1	1
Benefit obligation at December 31		483	438	425	483
Fair value at December 31 of the previous year			355	392
Currency rate conversion			(33)	(38)
Settlement				(2)
Actual return on plan assets			50	8
Employer contributions			17	15
Participants' contributions			1	1
Fair value at December 31		392	369	355	392
Unfunded status at December 31			(69)	(68)
Net actuarial loss			145	144
Prior service cost			4	5
Net amount recognized at December 31			80	81
Defined Benefit Plan, Assets for Plan Benefits, Noncurrent			9	6
Current liabilities			(2)	(3)
Noncurrent liabilities			(76)	(71)
Net amount recognized			(69)	(68)
Postretirement
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation at December 31 of the previous year			141	143
Interest cost			6	6
Actuarial (gain)/loss			5	1
Benefits paid			(9)	(9)
Benefit obligation at December 31		$ 143	143	141	$ 143
Employer contributions			9	9
Unfunded status at December 31			(143)	(141)
Net actuarial loss			48	49
Prior service cost			(4)	(6)
Net amount recognized at December 31			(99)	(98)
Current liabilities			(10)	(9)
Noncurrent liabilities			(133)	(132)
Net amount recognized			$ (143)	$ (141)