Acquisitions of Businesses (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 Cooper Industries plc [Member] Electrical Systems and Services; Electrical Products [Member]	Sep. 30, 2012 Rolec Comercial e Industrial S.A. [Member] Electrical Systems and Services [Member]	Dec. 31, 2011 Jeil Hydraulics Co. Ltd. [Member] Hydraulics [Member]	Dec. 31, 2011 Polimer Kaucuk Sanayi ve Pazarlama A.S. [Member] Hydraulics [Member]	Dec. 31, 2011 Gycom Electrical Low-Voltage Power Distribution, Control and Automation [Member] Electrical Systems and Services [Member]
Business Acquisition [Line Items]
Business acquisition, revenue reported by acquired entity for last annual period	$ 5,409	$ 85	$ 189	$ 335	$ 24