Debt and Credit Facilities - Total Debt Outstanding (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Short-term borrowings	$ 77.0	$ 39.2
Current portion of long-term debt	154.4	1.8
Total current debt	231.4	41.0
Credit facility amount outstanding	77.0	39.2
Other	3.4	3.8
Total long-term debt, less current portion	4,376.5	4,540.8
Total debt	4,607.9	4,581.8
Term Loan A Facility due October 2016 [Member]
Debt Instrument [Line Items]
Credit facility amount outstanding	810.3	843.9
Term Loan B Facility due October 2018 [Member]
Debt Instrument [Line Items]
Credit facility amount outstanding	764.2	771.6
5.25% Senior Notes due April 2023 [Member]
Debt Instrument [Line Items]
Senior Notes	425.0
12% Senior Notes due February 2014 [Member]
Debt Instrument [Line Items]
Senior Notes		153.4
7.875% Senior Notes due June 2017 [Member]
Debt Instrument [Line Items]
Senior Notes		394.5
8.125% Senior Notes due September 2019 [Member]
Debt Instrument [Line Items]
Senior Notes	750.0	750.0
6.50% Senior Notes due December 2020 [Member]
Debt Instrument [Line Items]
Senior Notes	425.0	425.0
8.375% Senior Notes due September 2021 [Member]
Debt Instrument [Line Items]
Senior Notes	750.0	750.0
6.875% Senior Notes due July 2033 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 448.6	$ 448.6

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Carrying value as of the balance sheet date of the sum of short-term debt and current maturities of long-term debt and capital lease obligations, which are due within one year (or one business cycle if longer).

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Amount borrowed under the credit facility as of the balance sheet date.

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Sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year from the balance sheet date or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer plus capital lease obligations due to be paid more than one year after the balance sheet date.

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Obligation related to long-term debt (excluding convertible debt) and capital leases, the portion which is due in one year or less in the future.

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Carrying value as of the balance sheet date of debt not otherwise defined (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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