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Restructuring - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges, including curtailment and settlement losses | $ (72.6) |  | $ (88.8)
Restructuring charges | 70.9 | $ 63.6 | 81.1
Restructuring, expected cost | 21.0 |  |
Cost of sales |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges, including curtailment and settlement losses | (59.2) |  | (68.4)
Restructuring charges |  | 55.4 |
Selling, general and administrative expenses |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges, including curtailment and settlement losses | (14.3) |  | (18.4)
Restructuring charges |  | 8.5 |
Other income and expense, net |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges, including curtailment and settlement losses | (0.9) |  | (2.0)
Restructuring charges |  | 0.3 |
Employee termination benefits |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 62.9 | 54.1 | 70.0
Asset impairments |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 1.3 | 4.7 | 3.9
Assets, amount of carrying amount in excess of fair value | 1.3 | 4.7 | 3.9
Contract termination costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 1.7 | 0.1 | 1.7
Other related costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 5.0 | 4.7 | 5.5
Pension benefit plan curtailment charges |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Curtailment gain (loss) |  |  | (7.7)
Pension |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Pension settlement and curtailment loss | 1.7 |  |
Pension | Foreign |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Curtailment gain (loss) | $ (0.9) | $ 0.0 | $ (7.7)

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