Accumulated Other Comprehensive Loss (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (1,260)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(442)	36
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(491)	269
Change in other comprehensive income, Separation and Merger Transaction		37
Net change	(862)	399	139
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(856)
Ending Balance	(2,116)	(1,260)
Unrealized Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(38)	6	(135)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(442)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(148)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0
Net change		(44)	141
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(590)
Ending Balance	(628)	(38)	6
Pension and Other Post retirement Benefit Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,157)	(1,597)	(1,597)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(377)	330
Change in other comprehensive income, Separation and Merger Transaction		33
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	42	77
Net change		440	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(335)
Ending Balance	(1,492)	(1,157)	(1,597)
Unrealized Gain (Loss) on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(65)	(75)	(68)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	34	19
Change in other comprehensive income, Separation and Merger Transaction		4
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	35	(13)
Net change		10	(7)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	69
Ending Balance	4	(65)	(75)
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,260)	(1,666)	(1,800)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	77	64
Net change	(856)	406	134
Ending Balance	$ (2,116)	$ (1,260)	$ (1,666)