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, 2015	Dec. 31, 2014
Other Current Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	$ 100.5	$ 98.7
Offset	16.3	15.9
Net Amount in Balance Sheet	84.2	82.8
Other Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	19.8	53.1
Offset	7.1	10.4
Net Amount in Balance Sheet	12.7	42.7
Other Current Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	16.7	16.4
Offset	16.3	15.9
Net Amount in Balance Sheet	0.4	0.5
Other Long-term Liabilities [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Amount	8.3	11.6
Offset	7.1	10.4
Net Amount in Balance Sheet	$ 1.2	$ 1.2