Fair Value Measurements and Other Financial Instruments - Carrying Amounts and Estimated Fair Values of Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other foreign loans, Carrying Amount	$ 222.5	$ 165.7
Other foreign loans, Fair Value	222.8	165.8
Other domestic loans, Carrying Amount	116.7	81.6
Other domestic loans, Fair Value	116.9	81.9
Total debt, Carrying Amount	4,661.5	4,555.3
Total debt, Fair Value	4,933.9	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	1,104.1	1,103.8
Credit Facility, Fair Value	1,104.1	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	423.0	422.7
Senior Notes, Fair Value	485.0	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	419.4	418.9
Senior Notes, Fair Value	446.3	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	419.5	419.0
Senior Notes, Fair Value	451.8	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	444.8	432.9
Senior Notes, Fair Value	491.6	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	420.1	419.7
Senior Notes, Fair Value	450.7	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	396.3	396.1
Senior Notes, Fair Value	430.9	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	445.3	445.2
Senior Notes, Fair Value	$ 484.0	$ 462.7