Stockholders' Equity - Schedule of Accumulated Other Comprehensive Loss (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ (3,888)	$ (3,557)	$ (2,768)
Other comprehensive income (loss) before reclassifications	1,261	(707)	(1,168)
Amounts reclassified from accumulated other comprehensive loss	375	276	262
Income taxes	(302)	100	117
Balance	(2,554)	(3,888)	(3,557)
Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(917)	(993)	(911)
Other comprehensive income (loss) before reclassifications	(151)	76	(82)
Balance	(1,068)	(917)	(993)
Fair Value of Derivatives
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	30	(26)	45
Other comprehensive income (loss) before reclassifications	49	92	(79)
Amounts reclassified from accumulated other comprehensive loss	(50)	(36)	8
Balance	29	30	(26)
Pension and Other Postretirement Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(3,142)	(2,538)	(1,902)
Other comprehensive income (loss) before reclassifications	1,328	(1,016)	(1,007)
Amounts reclassified from accumulated other comprehensive loss	425	312	254
Income taxes	(302)	100	117
Balance	(1,691)	(3,142)	(2,538)
Unrealized Gain on Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	141
Other comprehensive income (loss) before reclassifications	35	141
Balance	$ 176	$ 141