Expected Future Benefit Payments (Detail) $ in Millions	Dec. 31, 2015 USD ($)
U.S. Plans
Schedule of Pension Expected Future Benefit Payments [Line Items]
Expected future benefit payments, 2016	$ 361.8
Expected future benefit payments, 2017	362.6
Expected future benefit payments, 2018	362.9
Expected future benefit payments, 2019	363.5
Expected future benefit payments, 2020	364.5
Expected future benefit payments, 2021 - 2025	1,814.7
International Plans
Schedule of Pension Expected Future Benefit Payments [Line Items]
Expected future benefit payments, 2016	104.6
Expected future benefit payments, 2017	105.6
Expected future benefit payments, 2018	107.1
Expected future benefit payments, 2019	109.3
Expected future benefit payments, 2020	110.8
Expected future benefit payments, 2021 - 2025	573.9
Other Postretirement Benefit Plans
Schedule of Pension Expected Future Benefit Payments [Line Items]
Expected future benefit payments, 2016	15.9
Expected future benefit payments, 2017	15.4
Expected future benefit payments, 2018	14.7
Expected future benefit payments, 2019	14.0
Expected future benefit payments, 2020	13.1
Expected future benefit payments, 2021 - 2025	46.2
Gross Medicare Part D Receipts, 2016	1.1
Gross Medicare Part D Receipts, 2017	1.0
Gross Medicare Part D Receipts, 2018	0.9
Gross Medicare Part D Receipts, 2019	0.8
Gross Medicare Part D Receipts, 2020	0.7
Gross Medicare Part D Receipts, 2021 - 2025	$ 2.0

Schedule of Pension Expected Future Benefit Payments [Line Items]

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Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the prescription drug subsidy receipts to be received after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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