Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (2,116)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(630)	$ (442)	$ 36
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(24)	(491)	269
Change in other comprehensive income, Separation and Merger Transaction			37
Net change	(599)	(862)	399
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(586)
Ending Balance	(2,702)	(2,116)
Unrealized Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(628)	(38)	6
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(630)	(442)	36
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	$ (74)	(148)	(80)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Net change		(590)	(44)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ (704)
Ending Balance	(1,332)	(628)	(38)
Pension and Other Post retirement Benefit Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,492)	(1,157)	(1,597)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	9	(377)	330
Change in other comprehensive income, Separation and Merger Transaction			33
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	104	42	77
Net change		(335)	440
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	113
Ending Balance	(1,379)	(1,492)	(1,157)
Unrealized Gain (Loss) on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	4	(65)	(75)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	41	34	19
Change in other comprehensive income, Separation and Merger Transaction			4
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(36)	35	(13)
Net change		69	10
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	5
Ending Balance	9	4	(65)
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,116)	(1,260)	(1,666)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	68	77	64
Net change	(586)	(856)	406
Ending Balance	$ (2,702)	$ (2,116)	$ (1,260)