Other Liabilities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Financial Instruments Subject to Mandatory Redemption by Settlement Terms
Gain on asset acquisition	$ 7.7
Redeemable financial liability	174.8
Other Current Liabilities
Financial Instruments Subject to Mandatory Redemption by Settlement Terms
Current portion of mandatorily redeemable financial liability	$ 33.7