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DEBT - Schedule of Debt Outstanding (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Aug. 31, 2021 | Aug. 11, 2021 | Dec. 31, 2020 | Apr. 22, 2020
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Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 5,501.1 |  |  | $ 4,402.2 |
Less short-term debt and current maturities | (500.6) |  |  | (1,101.1) |
Less unamortized discounts and debt issuance costs | (31.1) |  |  | (23.8) |
Total long-term debt, net | 4,969.4 |  |  | 3,277.3 |
Commercial paper |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | 500.0 |  |  | 0.0 |
Notes, 2.3%, due June 2021 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 0.0 |  |  | 500.0 |
Debt instrument, interest rate (as a percent) | 2.30% |  |  |  |
Notes, 3.6%, due August 2021 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 0.0 |  |  | 300.0 |
Debt instrument, interest rate (as a percent) | 3.60% |  |  |  |
Notes, Floating Rate, due August 2021 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 0.0 |  |  | 300.0 |
Notes, 3.3%, due December 2022 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 500.0 |  |  | 500.0 |
Debt instrument, interest rate (as a percent) | 3.30% |  |  |  |
Notes, 3.95%, due June 2023 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 400.0 |  |  | 400.0 |
Debt instrument, interest rate (as a percent) | 3.95% |  |  |  |
Notes, 2.6%, due December 2024 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 750.0 |  |  | 750.0 |
Debt instrument, interest rate (as a percent) | 2.60% |  |  |  |
Notes, 2.6%, due December 2025 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 400.0 |  |  | 400.0 | $ 400.0
Debt instrument, interest rate (as a percent) | 2.60% |  |  |  | 2.60%
Notes, 3.25%, due June 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 275.0 |  |  | 275.0 |
Debt instrument, interest rate (as a percent) | 3.25% |  |  |  |
Term loan, due August 2026 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 700.0 | $ 700.0 |  | 0.0 |
Debentures, 6.9%, due July 2028 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 125.0 |  |  | 125.0 |
Debt instrument, interest rate (as a percent) | 6.90% |  |  |  |
Notes, 3.1%, due May 2030 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 600.0 |  |  | 600.0 | $ 600.0
Debt instrument, interest rate (as a percent) | 3.10% |  |  |  | 3.10%
Notes, 2.35%, due September 2031 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 1,000.0 |  | $ 1,000.0 | 0.0 |
Debt instrument, interest rate (as a percent) | 2.35% |  |  |  |
Notes, 7.0%, due July 2037 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 250.0 |  |  | 250.0 |
Debt instrument, interest rate (as a percent) | 7.00% |  |  |  |
Other |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Total debt | $ 1.1 |  |  | $ 2.2 |

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