Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I)
-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

Name:	us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2017
Income Taxes [Line Items]
Unrecognized tax benefits					$ 566.1
Unrecognized tax benefits that would have a favorable impact					$ 508.7
Servicio de Impuestos Internos [Member]
Income Taxes [Line Items]
Percent of claim agreed by tax authority in Chile					48.00%
Domestic Tax Authority [Member]
Income Taxes [Line Items]
Income tax rate	20.00%			20.00%
Scenario, Forecast [Member] \| Domestic Tax Authority [Member]
Income Taxes [Line Items]
Income tax rate		19.00%	19.25%