Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
-URI http://asc.fasb.org/extlink&oid=6506951

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.1)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Other Expense (Income) (Textuals) (Details) $ in Millions	12 Months Ended
Other Expense (Income) (Textuals) (Details) $ in Millions	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Feb. 17, 2016	Jun. 30, 2014 USD ($)
Summary of Investment Holdings [Line Items]
Deferred Revenue	$ 14.4				$ 20.0
Recognition of income related to nonrefundable payment		$ 1.5	$ 1.5
Unearned income, current	1.5
Unearned income, noncurrent	12.9
Share-based Compensation, Plan Modification & Accelerated Compensation Cost		8.0
Other Retirement Related Costs		0.5
Venezuela currency devaluation	2.7	0.0	0.0
License costs	0.0	0.0	1.2
Development Income	1.5	1.5	1.6
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Annuity Purchase		47.0
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Lump Sum Payments		3.4
Net Gain Due to Curtailments	2.1	0.0	0.0
Executive retirement and related costs	0.0	10.9	0.0
Share-based Compensation, New LTIP Award		2.4
Pension settlement charge	0.0	$ 50.4	$ 0.0
VENEZUELA
Summary of Investment Holdings [Line Items]
Venezuela, Net Monetary Assets	1.8
Cash, Cash Equivalents, and Short-term Investments	0.7
Non-monetary assets	4.5
Loss Contingency, Estimate of Possible Loss	$ 6.3
Foreign Currency Exchange Rate, Remeasurement		6.3		10.0