Derivative Instruments and Hedging Activities - Schedule of Effects of Master Netting Agreements on Condensed Consolidated Balance Sheets (Detail) - Cash Flow Hedges [Member] - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Other Current Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	$ 38.5	$ 41.8
Offset	2.9	7.9
Net Amount in Balance Sheet	35.6	33.9
Other Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	11.1	9.8
Offset	3.5	4.6
Net Amount in Balance Sheet	7.6	5.2
Other Current Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	2.9	7.9
Offset	2.9	7.9
Other Long-term Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	3.7	5.2
Offset	3.5	4.6
Net Amount in Balance Sheet	$ 0.2	$ 0.6