Debt and Credit Facilities - Total Debt Outstanding (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Short-term borrowings	$ 85.2us-gaap_ShortTermBorrowings	$ 130.4us-gaap_ShortTermBorrowings
Current portion of long-term debt	1.3	1.1
Total current debt	86.5us-gaap_DebtCurrent	131.5us-gaap_DebtCurrent
Other	3.5us-gaap_OtherLongTermDebtNoncurrent	1.6us-gaap_OtherLongTermDebtNoncurrent
Total long-term debt, less current portion	4,261.8	4,282.5
Total debt	4,348.3us-gaap_DebtAndCapitalLeaseObligations	4,414.0us-gaap_DebtAndCapitalLeaseObligations
Term Loan A Facility Due July 2017 [Member]
Debt Instrument [Line Items]
Credit facility amount outstanding	249.7	249.7
Term Loan A Facility Due July 2019 [Member]
Debt Instrument [Line Items]
Credit facility amount outstanding	1,106.9	1,129.4
6.50% Senior Notes Due December 2020 [Member]
Debt Instrument [Line Items]
Senior Notes	428.0	428.1
8.375% Senior Notes Due September 2021 [Member]
Debt Instrument [Line Items]
Senior Notes	750.0	750.0
4.875% Senior Notes due December 2022 [Member]
Debt Instrument [Line Items]
Senior Notes	425.0	425.0
5.25% Senior Notes Due April 2023 [Member]
Debt Instrument [Line Items]
Senior Notes	425.0	425.0
5.125% Senior Notes due December 2024 [Member]
Debt Instrument [Line Items]
Senior Notes	425.0	425.0
6.875% Senior Notes Due July 2033 [Member]
Debt Instrument [Line Items]
Senior Notes	$ 448.7	$ 448.7

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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-Publisher FASB

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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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