Basis of Presentation and Accounting Policies - Payroll Tax Credit (Details) € in Millions, $ in Millions	1 Months Ended
Mar. 31, 2017 USD ($)	Mar. 31, 2017 EUR (€)	Mar. 31, 2016 USD ($)	Mar. 31, 2016 EUR (€)
Accounting Policies [Abstract]
Net proceeds from sale of tax credits	$ 143.5	€ 133.0	$ 143.1	€ 129.9

Amount of cash inflow from the sale of receivables classified as other.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration