v3.22.2.2
Fair value measurement recurring basis (Detail) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Jun. 30, 2022
Fair Value Disclosures [Abstract]      
Marketable Securities $ 64.0   $ 89.0
Trading Securities at Fair Value 4.0   2.0
Interest Rate Cash Flow Hedge Asset at Fair Value 54.0   36.0
Interest Rate Cash Flow Hedge Liability at Fair Value     36.0
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Marketable Securities 64.0   89.0
Trading Securities at Fair Value 4.0   2.0
Interest Rate Cash Flow Hedge Asset at Fair Value 54.0   36.0
Interest Rate Cash Flow Hedge Liability at Fair Value     36.0
Payments for (Proceeds from) Businesses and Interest in Affiliates [1] 0.0 $ 1.0  
Derivative, Gain (Loss) on Derivative, Net 0.0 $ 2.0  
Fair Value, Inputs, Level 1 [Member]      
Fair Value Disclosures [Abstract]      
Marketable Securities 64.0   89.0
Trading Securities at Fair Value 4.0   2.0
Interest Rate Cash Flow Hedge Asset at Fair Value 0.0   0.0
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Marketable Securities 64.0   89.0
Trading Securities at Fair Value 4.0   2.0
Interest Rate Cash Flow Hedge Asset at Fair Value 0.0   0.0
Fair Value, Inputs, Level 2 [Member]      
Fair Value Disclosures [Abstract]      
Marketable Securities 0.0   0.0
Trading Securities at Fair Value 0.0   0.0
Interest Rate Cash Flow Hedge Asset at Fair Value 54.0   36.0
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Marketable Securities 0.0   0.0
Trading Securities at Fair Value 0.0   0.0
Interest Rate Cash Flow Hedge Asset at Fair Value 54.0   36.0
Fair Value, Inputs, Level 3 [Member]      
Fair Value Disclosures [Abstract]      
Marketable Securities 0.0   0.0
Trading Securities at Fair Value 0.0   0.0
Interest Rate Cash Flow Hedge Asset at Fair Value 0.0   0.0
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Marketable Securities 0.0   0.0
Trading Securities at Fair Value 0.0   0.0
Interest Rate Cash Flow Hedge Asset at Fair Value $ 0.0   $ 0.0
[1] Gain on sale of subsidiary for the three months ended September 30, 2021 was due to the sale of the facility in Woodstock, Illinois and the associated business