Derivative Instruments and Hedging Activities - Schedule of Effects of Master Netting Agreements on Condensed Consolidated Balance Sheets (Detail) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Other Current Assets [Member] | Derivatives Not Designated as Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount		$ 1.5
Offset		0.6
Net Amount in Balance Sheet		0.9
Other Current Assets [Member] | Cash Flow Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	$ 21.3	12.2
Offset	13.2	11.7
Net Amount in Balance Sheet	8.1	0.5
Other Assets [Member] | Cash Flow Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	15.0	3.7
Offset	8.8	3.7
Net Amount in Balance Sheet	6.2
Other Current Liabilities [Member] | Derivatives Not Designated as Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount		3.8
Offset		0.6
Net Amount in Balance Sheet		3.2
Other Current Liabilities [Member] | Cash Flow Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	22.0	37.4
Offset	13.2	11.7
Net Amount in Balance Sheet	8.8	25.7
Other Long-term Liabilities [Member] | Cash Flow Hedges [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	12.7	26.5
Offset	8.8	3.7
Net Amount in Balance Sheet	$ 3.9	$ 22.8