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Debt - Debt Outstanding Matures on Calendar Year Basis (Detail)
$ in Millions
Jun. 30, 2016
USD ($)
Debt Instrument [Line Items]  
Q3 - Q4 2016 $ 0.0
2017 350.0
2018 500.0
2019 2,022.5
2020 400.0
2021 500.0
Thereafter 800.0
Total debt, excluding unamortized issuance costs and discounts $ 4,572.5