Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (2,702)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(299)	$ (630)	$ (442)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(135)	(24)	(491)
Net change	336	(599)	(862)
Ending Balance	(2,356)	(2,702)
Unrealized Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,332)	(628)	(38)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(299)	(630)	(442)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	(167)	(74)	(148)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0
Net change		(704)	(590)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(466)
Ending Balance	(1,798)	(1,332)	(628)
Pension and Other Post retirement Benefit Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,379)	(1,492)	(1,157)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	29	9	(377)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	779	104	42
Net change	808	113	(335)
Ending Balance	(571)	(1,379)	(1,492)
Unrealized Gain (Loss) on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	9	4	(65)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	3	41	34
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1	(36)	35
Net change	4	5	69
Ending Balance	13	9	4
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(2,702)	(2,116)	(1,260)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	780	68	77
Net change	346	(586)	(856)
Ending Balance	$ (2,356)	$ (2,702)	$ (2,116)