Other Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Salaries and wages		$ 1,007	$ 941
Workers' compensation		338	306
Retirement benefits		306	296
Less current portion of lease liabilities		262	252
Fair value of cash flow hedges		79	32
Other	[1]	1,741	1,744
Total other current liabilities		3,733	3,571	[2]
Retirement benefits		5,182	5,172
Long-term lease liabilities		1,149	1,251
Customer deposits on commercial contracts		872	709
Deferred tax liability		461	588
Other	[3]	2,024	1,840
Other liabilities		$ 9,688	$ 9,560	[2]

[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] *Prior-period information has been restated for the retrospective application of a change in accounting principle related to the amortization of actuarial gains and losses for our qualified U.S. government pension plans, which we adopted in the fourth quarter of 2020. For further discussion of this change in accounting principle, see Note T to the Consolidated Financial Statements.

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