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Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]  
Schedule of Financial Instruments Recorded at Fair Value
Financial Instruments Recorded at Fair Value (in Millions)
 
December 31, 2015
 
December 31, 2014
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Level 1
 
Level 2
 
Level 3
 
Total
Assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
$
234.0

 
—

 
—
 
$
234.0

 
$
218.8

 
—

 
—
 
$
218.8

Deferred compensation asset (a)
—
 
$
1.5

 
—
 
$
1.5

 
—
 
$
3.2

 
—
 
$
3.2

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Liabilities:
 
 
 

 
 
 
 

 
 
 
 

 
 
 
 

Deferred compensation obligation (a)
—
 
1.4

 
—
 
1.4

 
—
 
3.0

 
—
 
3.0


 
(a)
The deferred compensation obligation represents the balance of deferred compensation plus net investment earnings. The deferred compensation plan is informally funded through a rabbi trust using variable universal life insurance. The cash surrender value of the life insurance policies is designed to track the deemed investments of the plan participants. Investment crediting options consist of institutional and retail investment funds. The deemed investments are classified within Level 2 of the valuation hierarchy because (i) of the indirect method of investing and (ii) unit prices of institutional funds are not quoted in active markets.