Other Liabilities (Details) - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Salaries and wages		$ 811	$ 952
Retirement benefits		267	272
Operating lease liabilities		255	0
Workers’ compensation		248	244
Fair value of cash flow hedges		102	141
Other	[1]	1,899	1,708
Total other current liabilities		3,582	3,317
Retirement benefits		4,334	4,422
Operating lease liabilities		1,129	0
Customer deposits on commercial contracts		678	726
Deferred income taxes		544	577
Other	[2]	1,714	1,768
Total other liabilities		$ 8,399	$ 7,493

[1] Consists primarily of dividends payable, taxes payable, environmental remediation reserves, warranty reserves, deferred revenue and supplier contributions in the Aerospace segment, liabilities of discontinued operations, finance lease liabilities and insurance-related costs.

[2] Consists primarily of warranty reserves, workers’ compensation liabilities, finance lease liabilities and liabilities of discontinued operations.