Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Long-Term Debt

The Company’s total indebtedness as of December 31, 2015 and 2014 consisted of the following:

	December 31,
	2015			2014
	(Dollars in millions)
2013 Term Loan Facility due September 2020	$	1,164.9		$	1,175.1
7.375% Senior Notes due November 2016	—			650.0
6.00% Senior Notes due November 2018	1,518.8			1,518.8
6.50% Senior Notes due September 2020	650.0			650.0
6.25% Senior Notes due November 2021	1,339.6			1,339.6
10.00% Senior Secured Second Lien Notes due March 2022	978.4		—	—
7.875% Senior Notes due November 2026	247.7			247.6
Convertible Junior Subordinated Debentures due December 2066	385.2			382.3
Capital lease obligations	30.3			22.2
Other	0.7			1.2
Total	$	6,315.6		$	5,986.8

Schedule of Interest Payments

Interest payments on the Senior Notes are scheduled to occur each year as follows:

Senior Notes	Interest Payment Dates
6.00% Senior Notes	May 15 and November 15
6.25% Senior Notes	May 15 and November 15
6.50% Senior Notes	March 15 and September 15
7.875% Senior Notes	May 1 and November 1

Carrying amount of the equity and debt components of the Debentures

The following table illustrates the carrying amount of the equity and debt components of the Debentures:

	December 31,
	2015			2014
	(Dollars in millions)
Carrying amount of the equity component	$	215.4		$	215.4
Principal amount of the liability component	$	732.5		$	732.5
Unamortized discount	(347.3		)	(350.2		)
Net carrying amount	$	385.2		$	382.3

Effective interest rate and the interest expense related to the Debentures

The following table illustrates the effective interest rate and the interest expense related to the Debentures:

	Year Ended December 31,
	2015			2014			2013
	(Dollars in millions)
Effective interest rate	4.9		%	4.9		%	4.9		%
Interest expense — contractual interest coupon	$	34.8		$	34.8		$	34.8
Interest expense — amortization of debt discount	2.9			2.6			2.3

Aggregate amounts of Long term debt maturities

The aggregate amounts of long-term debt maturities (including unamortized debt discounts) subsequent to December 31, 2015, including capital lease obligations, were as follows:

Year of Maturity	(Dollars in millions)
2016	$	5,930.4
2017	—
2018	—
2019	—
2020	—
2021 and thereafter	385.2
Total	$	6,315.6