Acquisitions - (Narrative) (Details) $ in Millions	12 Months Ended
Dec. 31, 2018 USD ($) Business	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) Business
Business Combinations [Abstract]
Number of businesses acquired \| Business	0		1
Business Acquisition, Percentage of Voting Interests Acquired		51.00%
Net cash consideration	$ 0.0	$ 0.0	$ 5.0
Consideration transferred		89.0
Goodwill		2.8
Change in noncontrolling interests		63.0
Adjustments to additional paid in capital, other		1.0
Decrease in other long-term liabilities		25.0
Gain on settlement of liabilities		$ 10.0

Decrease in Other Long-Term Liabilities

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Amount of other increase (decrease) in additional paid in capital (APIC).

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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- Definition

In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

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The number of businesses acquired by the entity during the period.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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