Other Financial Data Schedule of Non-current Assets (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Other Financial Data [Abstract]
Prepaid pension	$ 659	[1]	$ 567	[1]
Deferred project costs	259		273
Deferred tax assets	180		193
Taxes receivable	100		108
Other	248		282
Other Assets, Noncurrent	$ 1,446		$ 1,423

[1] Increase in prepaid pensions is primarily due to cash funding of the U.K. pension plans.