XML 22 R30.htm IDEA: XBRL DOCUMENT

Litigation, Investigations and Claims (Unaudited) (Details) (USD $) In Millions, unless otherwise specified				12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	May 04, 2012 United States Postal Service	Dec. 31, 2007 United States Postal Service	Jun. 30, 2012 United States Postal Service	Mar. 31, 2013 United States Postal Service Threatened Litigation
Loss Contingencies
Contract award				$ 875
Receivables, unpaid long-term contracts	3,050	2,858	63
Gain contingency, unrecorded amount			115
Claims asserted, range of possible loss, maximum	770				410
Loss Contingency, Range of Possible Loss, Minimum	$ 330					$ 179

The estimated maximum amount of possible loss from the contingency.

The estimated minimum amount of possible loss from the contingency.