Investigations, Claims and Litigation Investigations, Claims and Litigation (Details) In Millions, unless otherwise specified			12 Months Ended							0 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2007 United States Postal Service [Member] USD ($)	Dec. 31, 2014 United States Postal Service [Member] USD ($)	May 04, 2012 United States Postal Service [Member] Unpaid Portions of Contract Price and Direct Costs Incurred [Member] USD ($)	May 04, 2012 United States Postal Service [Member] Acts and Omissions with Adverse Affects on Performance and Obligations [Member] USD ($)	Dec. 31, 2014 Solystic Matter [Member] USD ($)	Dec. 31, 2014 Solystic Matter [Member] EUR (€)	Dec. 31, 2014 United States Postal Service [Member] False Claims Act [Member] Threatened Litigation [Member] USD ($)	Aug. 08, 2013 Solystic Matter [Member] Defendant	Dec. 31, 2014 Solystic Matter [Member] USD ($)	Dec. 31, 2014 Solystic Matter [Member] BRL	Dec. 31, 2014 Initial Claim [Member] Solystic Matter [Member] USD ($)	Dec. 31, 2014 Initial Claim [Member] Solystic Matter [Member] BRL	Dec. 31, 2014 Incremental claim [Member] Solystic Matter [Member] USD ($)	Dec. 31, 2014 Incremental claim [Member] Solystic Matter [Member] BRL
Loss Contingencies [Line Items]
Contract award			$ 875
Receivables, unpaid long-term contracts	2,806	2,685			63
Gain Contingency, Unrecorded Amount						115	38	31
Claims asserted, range of possible loss, maximum				410
Loss Contingency, Estimate of Possible Loss									$ 179		$ 42	111	$ 34	89	$ 8	22
Loss Contingency, Number of Defendants										2