Other Liabilities - Liabilities Balance (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Other Liabilities Disclosure [Abstract]
Salaries and wages	$ 718		$ 801
Workers' compensation	420		497
Retirement benefits	309		303
Deferred income taxes	729		300
Fair value of cash flow hedges	292		24
Other	1,390	[1]	1,533	[1]
Total other current liabilities	3,858		3,458
Retirement benefits	4,596		3,076
Customer deposits on commercial contracts	617		677
Deferred income taxes	82		135
Other	1,070	[2]	938	[2]
Total other liabilities	$ 6,365		$ 4,826

[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 and liabilities of discontinued operations.