[Line Items] for Accounting Policies [Table]

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- Definition

Ownership Interest in Subsidiary

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- Definition

Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

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- Definition

Percentage of fair value of reporting unit in excess of carrying amount.

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Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019	Jan. 01, 2018
Accounting Policies [Line Items]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		40.00%
Payments to Noncontrolling Interests	$ 26.9	$ 31.1	$ 26.9	$ 0.0
Cumulative effect of an accounting change					$ (0.7)	$ 12.2
Minimum [Member]
Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life		2 years
Maximum [Member]
Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life		25 years
Subsidiaries [Member]
Accounting Policies [Line Items]
Ownership Interest in Subsidiary		100.00%