Cash and Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Cash and Cash Equivalents [Abstract]

Schedule of Investment Components

The components of our investments as of December 31, 2013 are as follows (in millions): 

	Cash & Cash Equivalents		Restricted Cash		Restricted Marketable Securities		Total
Cash	$	64.5	$	52.4	$	—	$	116.9
Equity securities	—		—		47.6		47.6
Total	$	64.5	$	52.4	$	47.6	$	164.5

The components of our investments as of December 31, 2012 are as follows (in millions): 

	Cash & Cash Equivalents		Restricted Cash		Restricted Marketable Securities		Total
Cash	$	132.8	$	49.3	$	—	$	182.1
Equity securities	—		—		55.8		55.8
Total	$	132.8	$	49.3	$	55.8	$	237.9

Schedule of Restricted Cash

As of December 31, 2013 and 2012, Restricted cash consisted of the following (in millions): 

	As of December 31,
	2013		2012
Affiliate cash	$	13.6	$	22.5
Self-insured captive funds	37.8		26.0
Paid-loss deposit funds	1.0		0.8
Total restricted cash	$	52.4	$	49.3

Available-for-sale Securities Cost to Fair Value Reconciliation

A summary of our restricted marketable securities as of December 31, 2013 is as follows (in millions): 

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Equity securities	$	47.9	$	0.2	$	(0.5	)	$	47.6

A summary of our restricted marketable securities as of December 31, 2012 is as follows (in millions): 

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Equity securities	$	54.4	$	1.5	$	(0.1	)	$	55.8

Investment information related to restricted marketable securities

Investing information related to our restricted marketable securities is as follows (in millions): 

	For the Year Ended December 31,
	2013			2012		2011
Proceeds from sales of restricted available-for-sale securities	$	16.6		$	—	$	—
Gross realized gains	$	1.0		$	—	$	—
Gross realized losses	$	(0.1	)	$	—	$	—