Investments (Tables)

3 Months Ended

Mar. 31, 2017

Investments, Debt and Equity Securities [Abstract]



	Cost Basis		Unrealized Gain		Fair Value
As of March 31, 2017
Short-term investments
Certificates of deposit	$	77.7	$	—	$	77.7
Long-term investments
Assets held in a rabbi trust	$	8.0	$	0.9	$	8.9

As of December 31, 2016
Short-term investments
Certificates of deposit	$	64.1	$	—	$	64.1
Long-term investments
Assets held in a rabbi trust	$	7.9	$	0.6	$	8.5

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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