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Basis of Presentation and Accounting Policies - Narrative (Details) € in Millions, $ in Millions			1 Months Ended
	Apr. 04, 2018 USD ($)	Apr. 04, 2018 EUR (€)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 EUR (€)
Subsequent Event [Line Items]
Net proceeds from sale of tax credits			$ 143.5	€ 133.0
Subsequent Event
Subsequent Event [Line Items]
Net proceeds from sale of tax credits	$ 234.5	€ 190.9

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- Definition

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

+ References

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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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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