Pension and Other Postretirement Benefit Plans - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) agreement pension_plan age	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Services completed by employees for eligibility, retiring age | age	55
Tax expense related to defined benefit plans recognized in other comprehensive income (loss)	$ 3.0	$ 1.5	$ 7.1
Other (income) expense, net	31.6	(4.1)	40.6
Cost of sales	(18,830.2)	(18,175.9)	(16,435.0)
Selling, general and administrative expenses	$ (612.8)	(635.2)	(608.2)
Number of multi-employer pension plans | pension_plan	2
Number of collective bargaining agreements | agreement	3
Defined contribution retirement program
Defined Benefit Plan Disclosure [Line Items]
Defined contribution expense	$ 21.5	$ 21.3	21.2
Unionized employees | Multi-employer plan total contributions
Defined Benefit Plan Disclosure [Line Items]
Concentration risk percentage (more than)	5.00%	5.00%
April 24, 2020
Defined Benefit Plan Disclosure [Line Items]
Number of collective bargaining agreements | agreement	1
July 3, 2020
Defined Benefit Plan Disclosure [Line Items]
Number of collective bargaining agreements | agreement	2
ASU 2017-07 | Restatement Adjustment
Defined Benefit Plan Disclosure [Line Items]
Other (income) expense, net			34.2
Cost of sales			20.5
Selling, general and administrative expenses			13.7
Pension benefit plan curtailment and settlement losses
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain (loss)		$ (1.7)
Foreign
Defined Benefit Plan Disclosure [Line Items]
Defined contribution expense	$ 13.7	15.0	14.4
Pension
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 864.1	1,034.7
Pension | Minimum
Defined Benefit Plan Disclosure [Line Items]
Period for amortizing actuarial losses	5 years
Estimated minimum required contributions to pension plans in next fiscal year	$ 10.0
Pension | Maximum
Defined Benefit Plan Disclosure [Line Items]
Period for amortizing actuarial losses	28 years
Estimated minimum required contributions to pension plans in next fiscal year	$ 15.0
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Settlement payments	73.2	0.0
Settlement charge	5.4		34.2
Curtailment gain (loss)	$ 0.0	0.0	0.0
Pension | U.S. | Minimum | Return seeking assets
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	45.00%
Pension | U.S. | Minimum | Risk mitigating assets
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	35.00%
Pension | U.S. | Maximum | Return seeking assets
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	65.00%
Pension | U.S. | Maximum | Risk mitigating assets
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	55.00%
Pension | Foreign
Defined Benefit Plan Disclosure [Line Items]
Settlement payments	$ 0.0	0.0
Curtailment gain (loss)	$ (0.4)	(0.9)	$ 0.0
Pension | Foreign | Minimum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	45.00%
Pension | Foreign | Minimum | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	25.00%
Pension | Foreign | Minimum | Alternative investments
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	0.00%
Pension | Foreign | Minimum | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	0.00%
Pension | Foreign | Maximum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	65.00%
Pension | Foreign | Maximum | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	45.00%
Pension | Foreign | Maximum | Alternative investments
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	25.00%
Pension | Foreign | Maximum | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	15.00%
Other Postretirement | Minimum
Defined Benefit Plan Disclosure [Line Items]
Period for amortizing actuarial losses	3 years
Other Postretirement | Maximum
Defined Benefit Plan Disclosure [Line Items]
Period for amortizing actuarial losses	16 years
Other Postretirement | U.S.
Defined Benefit Plan Disclosure [Line Items]
Settlement payments	$ 0.0	0.0
Other Postretirement | Foreign
Defined Benefit Plan Disclosure [Line Items]
Settlement payments	$ 0.0	$ 0.0