Long-term Debt (Tables)

9 Months Ended

Sep. 30, 2015

Debt Disclosure [Abstract]

Summary of Long-term Debt

The following table provides a summary of the Company's long-term debt as of September 30, 2015 and December 31, 2014:

						Level 2 Fair Value (1) as of
	Principal Amount at Par		Issuance Date	Maturity	Interest Due Dates	September 30, 2015		December 31, 2014
	(in millions)					(in millions)
5.375% Senior Notes	$	500.0	February 2013	2021	February 1 and August 1	$	518.8	$	520.0
5.750% Senior Notes	400.0		February 2014	2024	March 1 and September 1	408.0		416.0
5.50% Senior Notes (2)	700.0		February 2015	2022	April 15 and October 15	707.0		—
5.875% Senior Notes (2)	800.0		February 2015	2025	April 15 and October 15	822.0		—

(1) Based on quoted market prices in less active markets.

(2) The net proceeds to the Company for the 5.50% and 5.875% Senior Notes issued in the first quarter of 2015 were an aggregate $1,482.4 million. Debt issuance costs of $17.6 million were recorded in "Other non-current assets" on the Consolidated Balance Sheets and are amortized over the term of the notes as "Interest expense" on the Consolidated Statements of Operations.