Investigations, Claims and Litigation (Unaudited) (Details) In Millions, unless otherwise specified								12 Months Ended		0 Months Ended
	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2015 United States Postal Service USD ($)	May 04, 2012 Unpaid Portions of Contract Price and Direct Costs Incurred [Member] United States Postal Service USD ($)	Mar. 31, 2015 Solystic Matter [Member] USD ($)	Mar. 31, 2015 Solystic Matter [Member] EUR (€)	May 04, 2012 Acts and Omissions with Adverse Affects on Performance and Obligations [Member] United States Postal Service USD ($)	Dec. 31, 2007 United States Postal Service USD ($)	Mar. 31, 2015 United States Postal Service False Claims Act Threatened Litigation USD ($)	Aug. 08, 2013 Solystic Matter [Member] Defendant	Mar. 31, 2015 Solystic Matter [Member] USD ($)	Mar. 31, 2015 Solystic Matter [Member] BRL	Mar. 31, 2015 Initial Claim [Member] Solystic Matter [Member] USD ($)	Mar. 31, 2015 Initial Claim [Member] Solystic Matter [Member] BRL	Mar. 31, 2015 Incremental claim [Member] Solystic Matter [Member] USD ($)	Mar. 31, 2015 Incremental claim [Member] Solystic Matter [Member] BRL
Loss Contingencies
Contract award								$ 875
Receivables, unpaid long-term contracts	3,131	2,806		63
Gain contingency, unrecorded amount					34	31	115
Claims asserted, range of possible loss, maximum	795		410
Loss contingency, estimate of possible loss									$ 179		$ 34	111	$ 27	89	$ 7	22
Loss Contingency, Number of Additional Defendants										2