Liabilities Balance (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Other Liabilities Disclosure [Abstract]
Dividends Payable	$ 196
Salaries and wages	754		835
Workers' compensation	529		578
Retirement benefits	328		318
Deferred income taxes	207		173
Other	1,466	[1]	1,205	[1]
Total other current liabilities	3,284		3,109
Retirement benefits	5,606		5,671
Customer deposits on commercial contracts	724		849
Deferred income taxes	136		144
Other	761	[2]	727	[2]
Total other liabilities	$ 7,227		$ 7,391

[1] Consists primarily of dividends payable, taxes 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.