Acquisitions (Narrative) (Details) (USD $) In Millions, unless otherwise specified					3 Months Ended		12 Months Ended
	Mar. 31, 2014 PST	Mar. 31, 2014 Other	Mar. 31, 2014 MAKO	Mar. 31, 2014 Trauson	Mar. 31, 2014 Customer relationship PST	Mar. 31, 2014 Customer relationship MAKO	Dec. 31, 2013 Customer relationship Trauson
Business Acquisition [Line Items]
Purchase price paid	$ 120	$ 172	$ 1,679	$ 751
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life					14 years	9 years	15 years