DEBT - Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Long-term debt
Total long-term debt	$ 9,670.8	$ 9,226.0	$ 9,476.7
Less amounts due within one year	350.1	1,049.2	1,098.8
Long-term debt	9,320.7	8,176.8	8,377.9
Capitalized debt issuance costs	53.6	48.6	49.3
Debt discount	$ 25.7	26.0	25.2
3.45% Senior Notes | Senior Notes
Long-term debt
Interest rate	3.45%
Total long-term debt	$ 1,497.5	1,495.7	1,493.9
4.50% Senior Notes | Senior Notes
Long-term debt
Interest rate	4.50%
Total long-term debt	$ 1,234.5	1,233.7	1,233.0
2.95% Senior Notes | Senior Notes
Long-term debt
Interest rate	2.95%
Total long-term debt	$ 796.5	795.5	794.6
3.80% Senior Notes | Senior Notes
Long-term debt
Interest rate	3.80%
Total long-term debt	$ 544.0	543.7	543.6
2.30% Senior Notes | Senior Notes
Long-term debt
Interest rate	2.30%
Total long-term debt	$ 498.0	497.6	497.1
4.30% Senior Notes | Senior Notes
Long-term debt
Interest rate	4.30%
Total long-term debt	$ 497.1	0.0	0.0
2.20% Senior Notes | Senior Notes
Long-term debt
Interest rate	2.20%
Total long-term debt	$ 496.1	495.5	494.8
4.50% Senior Notes | Senior Notes
Long-term debt
Interest rate	4.50%
Total long-term debt	$ 495.5	0.0	0.0
5.15% Senior Notes | Senior Notes
Long-term debt
Interest rate	5.15%
Total long-term debt	$ 495.4	0.0	0.0
3.30% Senior Notes | Senior Notes
Long-term debt
Interest rate	3.30%
Total long-term debt	$ 494.8	494.6	494.3
2.90% Senior Notes | Senior Notes
Long-term debt
Interest rate	2.90%
Total long-term debt	$ 492.4	492.1	491.9
4.80% Senior Notes | Senior Notes
Long-term debt
Interest rate	4.80%
Total long-term debt	$ 445.7	445.0	0.0
4.55% Senior Notes | Senior Notes
Long-term debt
Interest rate	4.55%
Total long-term debt	$ 398.4	397.6	0.0
4.55% Senior Notes | Senior Notes
Long-term debt
Interest rate	4.55%
Total long-term debt	$ 395.6	395.4	395.2
3.95% Senior Notes | Senior Notes
Long-term debt
Interest rate	3.95%
Total long-term debt	$ 350.1	351.6	353.1
4.00% Senior Notes | Senior Notes
Long-term debt
Interest rate	4.00%
Total long-term debt	$ 297.3	297.2	297.0
4.40% Senior Notes | Senior Notes
Long-term debt
Interest rate	4.40%
Total long-term debt	$ 241.8	241.3	240.9
0.53% to 8.00% Promissory Notes | Unsecured Debt
Long-term debt
Total long-term debt	$ 0.1	0.2	0.9
0.53% to 8.00% Promissory Notes | Unsecured Debt | Minimum
Long-term debt
Interest rate	0.53%
0.53% to 8.00% Promissory Notes | Unsecured Debt | Maximum
Long-term debt
Interest rate	8.00%
3.45% Senior Notes | Senior Notes
Long-term debt
Interest rate	3.45%
Total long-term debt	$ 0.0	399.8	399.4
4.25% Senior Notes | Senior Notes
Long-term debt
Interest rate	4.25%
Total long-term debt	$ 0.0	399.5	398.6
3.30% Senior Notes | Senior Notes
Long-term debt
Interest rate	3.30%
Total long-term debt	$ 0.0	250.0	249.9
4.05% Senior Notes | Senior Notes
Long-term debt
Interest rate	4.05%
Total long-term debt	$ 0.0	0.0	598.8
3.125% Senior Notes | Senior Notes
Long-term debt
Interest rate	3.125%
Total long-term debt	$ 0.0	$ 0.0	$ 499.7