Financial Instruments - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) Customer	Mar. 31, 2021 Customer	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Long-term debt, carrying values	$ 5,102.4		$ 5,100.9
Long-term debt, fair values	$ 4,930.0		$ 5,450.0
Customer Concentration Risk | Accounts Receivable
Debt Instrument [Line Items]
Number of customer accounted for 10% or more of consolidated accounts receivable | Customer	0	0
Customer Concentration Risk | Accounts Receivable | Minimum
Debt Instrument [Line Items]
Percentage of concentration risk	10.00%	10.00%