Debt and Credit Facilities - Total Debt Outstanding (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Weighted average interest rate	5.70%	6.20%
Amount outstanding under accounts receivable securitization program	$ 217
Revolving credit facilities	305
Current portion of long term debt	69.8	201.5
12% Senior Notes Due February 2014 [Member]
Debt Instrument [Line Items]
Debt interest rate	12.00%	12.00%
Senior Notes	150
Percentage of Senior Notes repaid	12.00%
Term Loan A Facility Noncurrent [Member]
Debt Instrument [Line Items]
Unamortized lender fees	6.1	8.4
Term Loan B Facility Noncurrent [Member]
Debt Instrument [Line Items]
Unamortized lender fees	6.6	7.3
Unamortized discount	9.7	10.8
8.125% Senior Notes Due September 2019 [Member]
Debt Instrument [Line Items]
Debt interest rate	8.125%	8.125%
6.50% Senior Notes Due December 2020 [Member]
Debt Instrument [Line Items]
Debt interest rate	6.50%	6.50%
8.375% Senior Notes Due September 2021 [Member]
Debt Instrument [Line Items]
Debt interest rate	8.375%	8.375%
5.25% Senior Notes Due April 2023 [Member]
Debt Instrument [Line Items]
Debt interest rate	5.25%	5.25%
6.875% Senior Notes Due July 2033 [Member]
Debt Instrument [Line Items]
Unamortized discount	1.4	1.4
Debt interest rate	6.875%	6.875%
Term Loan A Facility [Member]
Debt Instrument [Line Items]
Current portion of long term debt	$ 68.0