Restructuring and Other Charges - Reconciliation of Restructuring Liability (Detail) - USD ($) $ in Millions |
12 Months Ended | |||||||
---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
||||||
Restructuring Cost and Reserve [Line Items] | ||||||||
Beginning Balance | $ 3.0 | $ 10.9 | ||||||
Provision | 8.3 | 13.9 | $ 16.6 | |||||
Cash Expenditures | [1] | (5.2) | (21.6) | |||||
Non-Cash Write-offs | [2] | (0.3) | (0.2) | |||||
Ending Balance | 5.8 | 3.0 | 10.9 | |||||
Workforce Reduction Costs [Member] | ||||||||
Restructuring Cost and Reserve [Line Items] | ||||||||
Beginning Balance | 2.4 | 10.4 | ||||||
Provision | 6.7 | 9.3 | ||||||
Cash Expenditures | [1] | (3.9) | (17.5) | |||||
Non-Cash Write-offs | [2] | (0.2) | 0.2 | |||||
Ending Balance | 5.0 | 2.4 | 10.4 | |||||
Asset Disposals [Member] | ||||||||
Restructuring Cost and Reserve [Line Items] | ||||||||
Provision | 0.1 | |||||||
Non-Cash Write-offs | [2] | (0.1) | ||||||
Other [Member] | ||||||||
Restructuring Cost and Reserve [Line Items] | ||||||||
Beginning Balance | 0.6 | 0.5 | ||||||
Provision | 1.6 | 4.5 | ||||||
Cash Expenditures | [1] | (1.3) | (4.1) | |||||
Non-Cash Write-offs | [2] | (0.1) | (0.3) | |||||
Ending Balance | $ 0.8 | $ 0.6 | $ 0.5 | |||||
|