Investments (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016	Jan. 01, 2018
Schedule of Equity Method Investments [Line Items]
Transfer from investments					$ 15.5
Unrealized gain (loss) on investments					8.7
Equity method investment other than temporary impairment					22.3
Prepaid expenses and other current assets
Schedule of Equity Method Investments [Line Items]
Equity securities, fair value method		$ 9.4
Equity securities, fair value method, previous year	[1]		$ 17.0
Other noncurrent assets
Schedule of Equity Method Investments [Line Items]
Equity securities, fair value method	[2]	4.4
Equity securities, fair value method, previous year	[1]		6.3
Equity method investments		15.1	4.9	[1]
Other (income) expense, net
Schedule of Equity Method Investments [Line Items]
Equity securities, fair value method, other expense (inxcome)		9.5	0.0		0.0
Equity securites, equity method, other expense (income)		(2.7)	$ (0.3)		$ 4.1
Zibo Xinhua [Member]
Schedule of Equity Method Investments [Line Items]
Increase in investment in Zibo Xinhua		$ 7.5
Retained Earnings (Accumulated Deficit) | ASU 2016-01
Schedule of Equity Method Investments [Line Items]
ASU 2016-01 adoption impact						$ (1.0)

[1] (2) The December 31, 2017 balances presented reflect historical recognition and measurement investment categories existing prior to the adoption of ASU 2016-01, which include available for sale and cost method securities.

[2] (1) The December 31, 2018 equity securities are measured at fair value using the Net Asset Value practical expedient.