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	Mar. 31, 2020	Dec. 31, 2019
Other Current Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	$ 64.0	$ 41.8
Offset	3.6	7.9
Net Amount in Balance Sheet	60.4	33.9
Other Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	27.1	9.8
Offset	1.0	4.6
Net Amount in Balance Sheet	26.1	5.2
Other Current Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	3.6	7.9
Offset	3.6	7.9
Other Long-term Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	1.1	5.2
Offset	1.0	4.6
Net Amount in Balance Sheet	$ 0.1	$ 0.6