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Amount to be collected within one year of the balance sheet date (or one operating cycle, if longer) from customers in accordance with the contractual provisions of long-term contracts or programs including amounts billed and unbilled as of the balance sheet date.

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Investigations, Claims and Litigation Investigations, Claims and Litigation (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2007	Dec. 31, 2020	Feb. 16, 2018	May 04, 2012
United States Postal Service [Member]
Loss Contingencies [Line Items]
CounterclaimForDamagesSought			$ 193
Unpaid Portions of Contract Price and Direct Costs Incurred [Member] \| United States Postal Service [Member]
Loss Contingencies [Line Items]
Receivables, unpaid long-term contracts				$ 63
Acts and Omissions with Adverse Affects on Performance and Obligations [Member] \| United States Postal Service [Member]
Loss Contingencies [Line Items]
Gain Contingency, Unrecorded Amount				$ 115
United States Postal Service [Member]
Loss Contingencies [Line Items]
Contract award	$ 875
Maximum [Member] \| United States Postal Service [Member]
Loss Contingencies [Line Items]
Loss Contingency, Estimate of Possible Loss		$ 410