Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Our financial assets and liabilities that are measured at fair value on a recurring basis are as follows (in millions):



			Fair Value Measurements at Reporting Date Using
As of December 31, 2017	Fair Value		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Valuation Technique ⁽¹⁾
Prepaid expenses and other current assets:
Current portion of restricted marketable securities	$	17.8	$	—	$	17.8	$	—	M
Other long-term assets:
Restricted marketable securities	44.2		—		44.2		—		M
Redeemable noncontrolling interests	220.9		—		—		220.9		I
As of December 31, 2016
Prepaid expenses and other current assets:
Current portion of restricted marketable securities	$	24.2	$	—	$	24.2	$	—	M
Other long-term assets:
Restricted marketable securities	33.5		—		33.5		—		M
Redeemable noncontrolling interests	138.3		—		—		138.3		I


⁽¹⁾	The three valuation techniques are: market approach (M), cost approach (C), and income approach (I).

The carrying amounts and estimated fair values for our other financial instruments are presented in the following table (in millions):



	As of December 31, 2017				As of December 31, 2016
	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Long-term debt:
Advances under revolving credit facility	$	95.0	$	95.0	$	152.0	$	152.0
Term loan facilities	294.7		296.3		421.2		422.5
5.125% Senior Notes due 2023	295.9		306.8		295.3		297.8
5.75% Senior Notes due 2024	1,193.9		1,228.5		1,193.2		1,216.6
5.75% Senior Notes due 2025	344.4		364.9		343.9		349.6
2.00% Convertible Senior Subordinated Notes due 2043	—		—		275.7		382.6
Other notes payable	82.3		82.3		55.8		55.8
Financial commitments:
Letters of credit	—		35.4		—		33.3