Derivative Instruments and Hedging Activities - Schedule of Effects of Master Netting Agreements on Consolidated Balance Sheets (Detail) - Cash Flow Hedges [Member] - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Other Current Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	$ 41.8	$ 37.9
Offset	7.9	9.6
Net Amount in Balance Sheet	33.9	28.3
Other Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	9.8	20.9
Offset	4.6	3.5
Net Amount in Balance Sheet	5.2	17.4
Other Current Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	7.9	9.9
Offset	7.9	9.6
Net Amount in Balance Sheet		0.3
Other Long-term Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	5.2	3.7
Offset	4.6	3.5
Net Amount in Balance Sheet	$ 0.6	$ 0.2