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Income Taxes - Net Operating Losses Carryforwards (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 1,470.4	$ 1,514.2
Expiration dates	Dec. 31, 2028
State [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 2,205.0	2,480.5
Expiration dates	Dec. 31, 2027
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 398.2	$ 532.6
Netherlands [Member] | Foreign [Member]
Operating Loss Carryforwards [Line Items]
Expiration dates	Dec. 31, 2022

X

- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

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- Definition

Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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-Section 50
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+ References

No definition available.

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