Net Revenues by Consumer Sector (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Net revenues	$ 8,472	$ 8,326	$ 25,811	$ 25,520
Biscuits
Segment Reporting Information [Line Items]
Net revenues	2,898	2,776	8,713	8,265
Chocolate
Segment Reporting Information [Line Items]
Net revenues	2,232	2,140	6,791	6,562
Gum & Candy
Segment Reporting Information [Line Items]
Net revenues	1,261	1,321	3,762	3,947
Beverages
Segment Reporting Information [Line Items]
Net revenues	1,329	1,285	4,285	4,250
Cheese & Grocery
Segment Reporting Information [Line Items]
Net revenues	752	804	2,260	2,496
Latin America
Segment Reporting Information [Line Items]
Net revenues	1,308	1,286	4,045	3,996
Latin America | Biscuits
Segment Reporting Information [Line Items]
Net revenues	329	311	953	880
Latin America | Chocolate
Segment Reporting Information [Line Items]
Net revenues	253	237	901	874
Latin America | Gum & Candy
Segment Reporting Information [Line Items]
Net revenues	353	364	1,049	1,069
Latin America | Beverages
Segment Reporting Information [Line Items]
Net revenues	211	208	666	678
Latin America | Cheese & Grocery
Segment Reporting Information [Line Items]
Net revenues	162	166	476	495
Asia Pacific
Segment Reporting Information [Line Items]
Net revenues	1,136	1,228	3,743	3,770
Asia Pacific | Biscuits
Segment Reporting Information [Line Items]
Net revenues	285	336	1,028	1,036
Asia Pacific | Chocolate
Segment Reporting Information [Line Items]
Net revenues	378	395	1,190	1,201
Asia Pacific | Gum & Candy
Segment Reporting Information [Line Items]
Net revenues	209	210	638	643
Asia Pacific | Beverages
Segment Reporting Information [Line Items]
Net revenues	99	103	371	346
Asia Pacific | Cheese & Grocery
Segment Reporting Information [Line Items]
Net revenues	165	184	516	544
EEMEA
Segment Reporting Information [Line Items]
Net revenues	948	886	2,850	2,700
EEMEA | Biscuits
Segment Reporting Information [Line Items]
Net revenues	165	145	490	431
EEMEA | Chocolate
Segment Reporting Information [Line Items]
Net revenues	294	280	806	768
EEMEA | Gum & Candy
Segment Reporting Information [Line Items]
Net revenues	160	179	505	538
EEMEA | Beverages
Segment Reporting Information [Line Items]
Net revenues	260	228	849	772
EEMEA | Cheese & Grocery
Segment Reporting Information [Line Items]
Net revenues	69	54	200	191
Europe Segment
Segment Reporting Information [Line Items]
Net revenues	3,295	3,158	10,026	9,967
Europe Segment | Biscuits
Segment Reporting Information [Line Items]
Net revenues	750	658	2,231	2,055
Europe Segment | Chocolate
Segment Reporting Information [Line Items]
Net revenues	1,224	1,138	3,680	3,497
Europe Segment | Gum & Candy
Segment Reporting Information [Line Items]
Net revenues	227	234	702	746
Europe Segment | Beverages
Segment Reporting Information [Line Items]
Net revenues	759	746	2,399	2,453
Europe Segment | Cheese & Grocery
Segment Reporting Information [Line Items]
Net revenues	335	382	1,014	1,216
North America Segment
Segment Reporting Information [Line Items]
Net revenues	1,785	1,768	5,147	5,087
North America Segment | Biscuits
Segment Reporting Information [Line Items]
Net revenues	1,369	1,326	4,011	3,863
North America Segment | Chocolate
Segment Reporting Information [Line Items]
Net revenues	83	90	214	222
North America Segment | Gum & Candy
Segment Reporting Information [Line Items]
Net revenues	312	334	868	951
North America Segment | Beverages
Segment Reporting Information [Line Items]
Net revenues				1
North America Segment | Cheese & Grocery
Segment Reporting Information [Line Items]
Net revenues	$ 21	$ 18	$ 54	$ 50