Liabilities Balance (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011
Other Liabilities [Line Items]
Salaries and wages	$ 794		$ 845
Workers' compensation	570		575
Retirement benefits	283		275
Deferred income taxes	134		131
Other	1,348	[1]	1,390	[1]
Total other current liabilities	3,129		3,216
Retirement benefits	4,328		4,627
Customer deposits on commercial contracts	895		1,132
Deferred income taxes	178		170
Other	713	[2]	670	[2]
Total other liabilities	$ 6,114		$ 6,599

[1] Consists primarily of dividends payable, environmental remediation reserves, warranty reserves, liabilities of discontinued operations and insurance-related costs.

[2] Consists primarily of liabilities for warranty reserves and workers' compensation.