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Income Taxes - Net Operating Losses Carryforwards (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 1,568.4	$ 1,572.9
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1,161.0	1,090.7
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 321.7	$ 229.4

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- 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=121826272&loc=d3e32559-109319

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