Acquisitions and Divestitures (Assets Acquired and Liability Assumed - Prestolite) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Nov. 02, 2012
Business Acquisition [Line Items]
Intangible assets	$ 64.4	$ 52.1
Goodwill	26.1	184.6	187.6
Prestolite [Member]
Business Acquisition [Line Items]
Cash				0.7
Accounts receivable				22.7	[1]
Inventories				17.3
Property, plant and equipment				24.6
Intangible assets				11.7
Goodwill				7.8
Other current and noncurrent assets				2.0
Total Assets				86.8
Current liabilities				20.1
Other liabilities				7.2
Total liabilities				$ 27.3

[1] Accounts receivable is gross contractual value. As of the acquisition date, the fair value of accounts receivable approximated carrying value.