Other Long Term Liabilities Summary (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Other Liabilities [Line Items]
Long-term lease obligations	$ 1,435
Construction liabilities	385	87
Tax contingencies	457	336
Long-term deferred tax liabilities	571	476
Other	839	632
Other long-term liabilities	4,242	2,277
Capital leases, including interest
Other Liabilities [Line Items]
Long-term lease obligations	1,435	737
Long-term financing lease obligations
Other Liabilities [Line Items]
Long-term lease obligations	$ 555	$ 9