Pension and Other Postretirement Benefit Plans - Additional Information (Detail) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2019 USD ($) pension_plan agreement	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) pension_plan agreement age	Dec. 31, 2018 USD ($)	Dec. 31, 2017 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)			$ (13.7)	$ 3.0	$ 1.5
Other (income) expense, net			24.6	31.6	(4.1)
Cost of sales			(18,072.8)	(18,830.2)	(18,175.9)
Selling, general and administrative expenses			$ (605.0)	(612.8)	(635.2)
Number of multi-employer pension plans | pension_plan	2		2
Number of collective bargaining agreements | agreement	4		4
Defined contribution retirement program
Defined Benefit Plan Disclosure [Line Items]
Defined contribution expense			$ 17.6	$ 21.5	21.3
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		1
July 3, 2020
Defined Benefit Plan Disclosure [Line Items]
Number of collective bargaining agreements | agreement	2		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
Foreign
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain (loss)	$ 12.9
Defined contribution expense			$ 14.0	$ 13.7	15.0
Pension
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	990.3	$ 864.1	$ 990.3	864.1
Pension | Minimum
Defined Benefit Plan Disclosure [Line Items]
Period for amortizing actuarial losses			5 years
Estimated required contributions to pension plans in next fiscal year	15.0		$ 15.0
Pension | Maximum
Defined Benefit Plan Disclosure [Line Items]
Period for amortizing actuarial losses			36 years
Estimated required contributions to pension plans in next fiscal year	$ 20.0		$ 20.0
Pension | U.S.
Defined Benefit Plan Disclosure [Line Items]
Settlement payments			0.0	73.2
Settlement charge		$ (5.4)		5.4	1.7
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%		45.00%
Pension | U.S. | Minimum | Risk mitigating assets
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	35.00%		35.00%
Pension | U.S. | Maximum | Return seeking assets
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	65.00%		65.00%
Pension | U.S. | Maximum | Risk mitigating assets
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	55.00%		55.00%
Pension | Foreign
Defined Benefit Plan Disclosure [Line Items]
Settlement payments			$ 0.0	0.0
Curtailment gain (loss)			$ 2.3	(0.4)	(0.9)
Pension | Foreign | Minimum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	45.00%		45.00%
Pension | Foreign | Minimum | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	25.00%		25.00%
Pension | Foreign | Minimum | Alternative investments
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	0.00%		0.00%
Pension | Foreign | Minimum | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	0.00%		0.00%
Pension | Foreign | Maximum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	65.00%		65.00%
Pension | Foreign | Maximum | Fixed income
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	45.00%		45.00%
Pension | Foreign | Maximum | Alternative investments
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	25.00%		25.00%
Pension | Foreign | Maximum | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Target percentage of asset allocation	15.00%		15.00%
Other Postretirement | Minimum
Defined Benefit Plan Disclosure [Line Items]
Period for amortizing actuarial losses			2 years
Other Postretirement | Maximum
Defined Benefit Plan Disclosure [Line Items]
Period for amortizing actuarial losses			18 years
Other Postretirement | U.S.
Defined Benefit Plan Disclosure [Line Items]
Settlement payments			$ 0.0	0.0
Curtailment gain (loss)			0.0	0.0	0.0
Other Postretirement | Foreign
Defined Benefit Plan Disclosure [Line Items]
Settlement payments			0.0	0.0
Curtailment gain (loss)			10.6	$ 0.0	$ 0.0
Other Postretirement | Foreign | Pension benefit plan curtailment gain
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain (loss)			$ 10.6