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, 2017	Dec. 31, 2016
Other Current Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	$ 39.3	$ 57.9
Offset	20.2	20.6
Net Amount in Balance Sheet	19.1	37.3
Other Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	17.0	34.9
Offset	8.2	6.8
Net Amount in Balance Sheet	8.8	28.1
Other Current Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	27.3	20.9
Offset	20.2	20.6
Net Amount in Balance Sheet	7.1	0.3
Other Long-term Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	9.9	6.9
Offset	8.2	6.8
Net Amount in Balance Sheet	$ 1.7	$ 0.1