Fair Value Measurements and Other Financial Instruments - Carrying Amounts and Estimated Fair Values of Debt (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other foreign loans, Carrying Amount	$ 166.1	$ 165.7
Other foreign loans, Fair Value	166.5	165.8
Other domestic loans, Carrying Amount	121.7	81.6
Other domestic loans, Fair Value	121.8	81.9
Total debt, Carrying Amount	4,616.7	4,555.3
Total debt, Fair Value	4,812.2	4,690.8
Term Loan A Due July 2017 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Credit Facility, Carrying Amount	249.8	249.7
Credit Facility, Fair Value	249.8	249.7
Term Loan A Due July 2019 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Credit Facility, Carrying Amount	1,115.4	1,103.8
Credit Facility, Fair Value	1,115.4	1,103.8
6.50% Senior Notes Due December 2020 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes, Carrying Amount	422.9	422.7
Senior Notes, Fair Value	480.7	473.7
4.875% Senior Notes due December 2022 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes, Carrying Amount	419.3	418.9
Senior Notes, Fair Value	441.7	426.5
5.25% Senior Notes Due April 2023 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes, Carrying Amount	419.4	419.0
Senior Notes, Fair Value	441.3	436.2
4.50% Senior Notes due September 2023 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes, Carrying Amount	440.8	432.9
Senior Notes, Fair Value	466.8	452.7
5.125% Senior Notes due December 2024 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes, Carrying Amount	419.9	419.7
Senior Notes, Fair Value	437.9	427.6
5.50% Senior Notes due September 2025 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes, Carrying Amount	396.2	396.1
Senior Notes, Fair Value	412.3	410.2
6.875% Senior Notes Due July 2033 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes, Carrying Amount	445.2	445.2
Senior Notes, Fair Value	$ 478.0	$ 462.7