Fair Value Measurements and Other Financial Instruments - Carrying Amounts and Estimated Fair Values of Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Carrying Amount [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other foreign loans	$ 88.0	$ 78.9
Other domestic loans	37.2	21.4
Total debt	4,382.7	4,359.0
Carrying Amount [Member] | Continuing Operations [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total debt	4,156.1	4,142.6
Carrying Amount [Member] | Discontinued Operations Held for Sale [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total debt	226.6	216.4
Carrying Amount [Member] | 6.50% Senior Notes Due December 2020 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	423.2	423.1
Carrying Amount [Member] | 4.875% Senior Notes due December 2022 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	419.8	419.6
Carrying Amount [Member] | 5.25% Senior Notes Due April 2023 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	419.9	419.7
Carrying Amount [Member] | 4.50% Senior Notes due September 2023 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	423.1	416.7
Carrying Amount [Member] | 5.125% Senior Notes due December 2024 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	420.3	420.2
Carrying Amount [Member] | 5.50% Senior Notes due September 2025 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	396.5	396.4
Carrying Amount [Member] | 6.875% Senior Notes Due July 2033 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	445.3	445.3
Fair Value [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other foreign loans	88.2	79.2
Other domestic loans	37.0	21.3
Total debt	4,620.1	4,546.4
Fair Value [Member] | Continuing Operations [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total debt	4,393.5	4,330.0
Fair Value [Member] | Discontinued Operations Held for Sale [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total debt	226.6	216.4
Fair Value [Member] | 6.50% Senior Notes Due December 2020 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	475.3	477.3
Fair Value [Member] | 4.875% Senior Notes due December 2022 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	442.0	437.6
Fair Value [Member] | 5.25% Senior Notes Due April 2023 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	444.3	441.1
Fair Value [Member] | 4.50% Senior Notes due September 2023 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	469.6	453.4
Fair Value [Member] | 5.125% Senior Notes due December 2024 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	442.1	437.3
Fair Value [Member] | 5.50% Senior Notes due September 2025 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	423.2	418.8
Fair Value [Member] | 6.875% Senior Notes Due July 2033 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Senior Notes	489.0	462.7
Term Loan A Due July 2017 [Member] | Carrying Amount [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Credit Facility	249.9	249.9
Term Loan A Due July 2017 [Member] | Fair Value [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Credit Facility	249.9	249.9
Term Loan A Due July 2019 [Member] | Carrying Amount [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Credit Facility	1,059.5	1,067.8
Term Loan A Due July 2019 [Member] | Fair Value [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Credit Facility	$ 1,059.5	$ 1,067.8