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DEBT AND INTEREST - Other Debt Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Debt instrument |  |  |  |  |
Carrying value | $ 7,541.2 |  | $ 7,541.2 |  | $ 8,180.0
Long-term debt, current maturities | (2.4) |  | (2.4) |  | (628.6)
Long-term debt | 7,538.8 |  | 7,538.8 |  | 7,551.4
Repayments of long-term debt |  |  | 629.6 |  |
Interest |  |  |  |  |
Interest expense | 80.2 | $ 82.7 | 174.7 | $ 162.8 |
Interest income | (1.4) | (4.9) | (24.3) | (10.8) |
Interest expense, net | 78.8 | $ 77.8 | $ 150.4 | $ 152.0 |
Public Notes |  |  |  |  |
Debt instrument |  |  |  |  |
Principal outstanding payable at time of prepayment of notes (as a percent) |  |  | 101.00% |  |
Five Year 2022 senior notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 494.9 |  | $ 494.9 |  | 494.2
Aggregate principal amount | 500.0 |  | $ 500.0 |  |
Debt instrument, term |  |  | 5 years |  |
Six Year 2021 Senior Notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 497.8 |  | $ 497.8 |  | 497.4
Aggregate principal amount | 500.0 |  | $ 500.0 |  |
Debt instrument, term |  |  | 6 years |  |
Ten year 2017 senior notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 445.6 |  | $ 445.6 |  | 448.3
Aggregate principal amount | 500.0 |  | $ 500.0 |  |
Debt instrument, term |  |  | 10 years |  |
Ten year 2020 senior notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 652.5 |  | $ 652.5 |  | 662.7
Aggregate principal amount | 698.0 |  | $ 698.0 |  |
Debt instrument, term |  |  | 10 years |  |
Ten year 2020 senior notes, maturing in 2031 |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 556.6 |  | $ 556.6 |  | 561.0
Aggregate principal amount | 600.0 |  | $ 600.0 |  |
Debt instrument, term |  |  | 10 years |  |
Eleven Year 2021 Senior Notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 645.5 |  | $ 645.5 |  | 645.2
Aggregate principal amount | 650.0 |  | $ 650.0 |  |
Debt instrument, term |  |  | 11 years |  |
Thirty year 2011 senior notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 384.9 |  | $ 384.9 |  | 384.7
Aggregate principal amount | 389.0 |  | $ 389.0 |  |
Debt instrument, term |  |  | 30 years |  |
Thirty year 2017 senior notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 427.5 |  | $ 427.5 |  | 426.8
Aggregate principal amount | 484.0 |  | $ 484.0 |  |
Debt instrument, term |  |  | 30 years |  |
Thirty year 2020 senior notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 491.2 |  | $ 491.2 |  | 491.1
Aggregate principal amount | 500.0 |  | $ 500.0 |  |
Debt instrument, term |  |  | 30 years |  |
Thirty Year 2021 Senior Notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 839.5 |  | $ 839.5 |  | 839.3
Aggregate principal amount | 850.0 |  | $ 850.0 |  |
Debt instrument, term |  |  | 30 years |  |
Thirty-four year 2021 senior notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 540.2 |  | $ 540.2 |  | 539.2
Aggregate principal amount | 685.0 |  | $ 685.0 |  |
Debt instrument, term |  |  | 34 years |  |
Seven year 2016 senior euro notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value |  |  |  |  | 625.9
Aggregate principal amount | 575.0 |  | $ 575.0 |  |
Debt instrument, term |  |  | 7 years |  |
Ten year 2016 senior notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 728.5 |  | $ 728.5 |  | 728.2
Aggregate principal amount | 750.0 |  | $ 750.0 |  |
Debt instrument, term |  |  | 10 years |  |
Thirty year 2016 senior notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 197.4 |  | $ 197.4 |  | 197.4
Aggregate principal amount | 200.0 |  | $ 200.0 |  |
Debt instrument, term |  |  | 30 years |  |
Ten Year 2015 senior euro notes |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | 623.1 |  | $ 623.1 |  | 625.1
Aggregate principal amount | 575.0 |  | $ 575.0 |  |
Debt instrument, term |  |  | 10 years |  |
Other debt. |  |  |  |  |
Debt instrument |  |  |  |  |
Carrying value | $ 16.0 |  | $ 16.0 |  | $ 13.5

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