v2.4.0.8
Income Statement Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of Condensed Consolidating Statement of Operations [Line Items]      
Depreciation expense $ 15,019 $ 14,920 $ 14,991
Interest costs on debt balances 3,421 2,977 3,269
Capitalized interest costs (754) (406) (442)
Advertising expense $ 2,438 $ 2,381 $ 2,523