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Financial Instruments - Additional Information (Detail) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 USD ($) Customer | Jun. 30, 2021 Customer | Dec. 31, 2021 USD ($)
Debt Instrument [Line Items] |  |  |
Long-term debt, carrying values | $ 5,044.3 |  | $ 5,100.9
Long-term debt, fair values | $ 4,480.0 |  | $ 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% |

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