Derivative Instruments and Hedging Activities - Fair Value Balance Sheet (Details) $ in Millions, $ in Millions	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 CAD ($)
Derivatives designated as hedging instruments
Derivatives designated as hedging instruments
Derivative asset, fair value, designated as hedging instrument	$ 106.9	$ 42.7
Derivative liability, fair value, designated as hedging instrument	0.0	(2.5)
Derivatives designated as hedging instruments | Forward starting interest rate swaps | Other Noncurrent Assets
Derivatives designated as hedging instruments
Derivative asset, fair value, designated as hedging instrument	96.3	41.6
Derivatives designated as hedging instruments | Forward starting interest rate swaps | Other Liabilities
Derivatives designated as hedging instruments
Derivative liability, fair value, designated as hedging instrument	0.0	0.0
Derivatives designated as hedging instruments | Foreign currency forwards | Other Current Assets
Derivatives designated as hedging instruments
Derivative asset, fair value, designated as hedging instrument	7.7	1.1
Derivatives designated as hedging instruments | Foreign currency forwards | Other Noncurrent Assets
Derivatives designated as hedging instruments
Derivative asset, fair value, designated as hedging instrument	2.9	0.0
Derivatives designated as hedging instruments | Foreign currency forwards | Accounts payable and other current liabilities
Derivatives designated as hedging instruments
Derivative liability, fair value, designated as hedging instrument	0.0	(1.2)
Derivatives designated as hedging instruments | Foreign currency forwards | Other Liabilities
Derivatives designated as hedging instruments
Derivative liability, fair value, designated as hedging instrument	0.0	(1.3)
Derivatives not designated as hedging instruments
Derivatives not designated as hedging instruments
Derivative asset, not designated as hedging instrument, fair value	16.9	17.9
Derivative liability, not designated as hedging instrument, fair value	(13.2)	(48.3)
Derivatives not designated as hedging instruments | Foreign currency forwards
Derivatives designated as hedging instruments
Notional amount			$ 195.0	$ 260
Derivatives not designated as hedging instruments
Notional amount			$ 195.0	$ 260
Derivatives not designated as hedging instruments | Commodity swaps
Derivatives designated as hedging instruments
Notional amount	376.4	653.5
Derivatives not designated as hedging instruments
Notional amount	376.4	653.5
Derivatives not designated as hedging instruments | Commodity swaps | Other Current Assets
Derivatives not designated as hedging instruments
Derivative asset, not designated as hedging instrument, fair value	15.1	11.1
Derivatives not designated as hedging instruments | Commodity swaps | Other Noncurrent Assets
Derivatives not designated as hedging instruments
Derivative asset, not designated as hedging instrument, fair value	1.5	6.6
Derivatives not designated as hedging instruments | Commodity swaps | Accounts payable and other current liabilities
Derivatives not designated as hedging instruments
Derivative liability, not designated as hedging instrument, fair value	(10.5)	(42.0)
Derivatives not designated as hedging instruments | Commodity swaps | Other Liabilities
Derivatives not designated as hedging instruments
Derivative liability, not designated as hedging instrument, fair value	(2.4)	(6.1)
Derivatives not designated as hedging instruments | Commodity options
Derivatives designated as hedging instruments
Notional amount	24.6	21.7
Derivatives not designated as hedging instruments
Notional amount	24.6	21.7
Derivatives not designated as hedging instruments | Commodity options | Other Current Assets
Derivatives not designated as hedging instruments
Derivative asset, not designated as hedging instrument, fair value	0.3	0.2
Derivatives not designated as hedging instruments | Commodity options | Accounts payable and other current liabilities
Derivatives not designated as hedging instruments
Derivative liability, not designated as hedging instrument, fair value	(0.3)	(0.2)
Cash Flow Hedges | Derivatives designated as hedging instruments | Forward starting interest rate swaps
Derivatives designated as hedging instruments
Notional amount	1,000.0	1,000.0
Derivatives not designated as hedging instruments
Notional amount	1,000.0	1,000.0
Cash Flow Hedges | Derivatives designated as hedging instruments | Foreign currency forwards
Derivatives designated as hedging instruments
Notional amount	196.2	219.4
Derivatives not designated as hedging instruments
Notional amount	$ 196.2	$ 219.4