Retirement Plans - Amounts Recognized on Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit cost (included in accrued liabilities)	$ (347.4)	$ (447.5)
Pension liabilities	(97.9)	(102.7)
OPEB plan liabilities	(67.8)	(113.2)
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Prepaid pension cost (included in other noncurrent assets)	46.4	39.9
Accrued benefit cost (included in accrued liabilities)	(2.7)	(2.7)
Pension liabilities	(97.9)	(102.7)
OPEB plan liabilities	0.0	0.0
Net liabilities recognized in the Consolidated Balance Sheets - Continuing Operations	(54.2)	(65.5)
OPEB
Defined Benefit Plan Disclosure [Line Items]
Prepaid pension cost (included in other noncurrent assets)	0.0	0.0
Accrued benefit cost (included in accrued liabilities)	(0.4)	(0.6)
Pension liabilities	0.0	0.0
OPEB plan liabilities	(67.8)	(113.2)
Net liabilities recognized in the Consolidated Balance Sheets - Continuing Operations	$ (68.2)	$ (113.8)

Prepaid pension cost noncurrent.

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as noncurrent. Excludes other postretirement benefit plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

Amount of asset (liability), recognized in statement of financial position, for defined benefit pension and other postretirement plans.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

For a classified balance sheet, the carrying amount as of the balance sheet date of the portion of the obligations recognized for the various benefits provided to former or inactive employees, their beneficiaries, and covered dependents after employment but before retirement that is payable after one year (or beyond the operating cycle if longer).

+ References

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