Borrowings - Long Term Debt (Details) € in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($)	Sep. 30, 2024 EUR (€)	Dec. 31, 2023 USD ($)
Long-term
Total long-term debt	$ 3,007,820		$ 2,991,759
Unamortized debt discounts	9,500		10,900
Deferred debt issuance costs	$ 7,500		8,900
3.15% 10-year notes due November 15, 2025
Long-term
Stated interest rate	3.15%	3.15%
Term of debt	10 years
Principal	$ 400,000
Total long-term debt	$ 399,242		398,737
1.25% 10-year notes due November 9, 2026 (euro-denominated)
Long-term
Stated interest rate	1.25%	1.25%
Term of debt	10 years
Principal | €		€ 600,000
Total long-term debt	$ 665,676		657,628
0.750% 8-year notes due November 4, 2027 (euro-denominated)
Long-term
Stated interest rate	0.75%	0.75%
Term of debt	8 years
Principal | €		€ 500,000
Total long-term debt	$ 553,996		547,342
6.65% 30-year debentures due June 1, 2028
Long-term
Stated interest rate	6.65%	6.65%
Term of debt	30 years
Principal	$ 200,000
Total long-term debt	$ 199,632		199,557
2.950% 10-year notes due November 4, 2029
Long-term
Stated interest rate	2.95%	2.95%
Term of debt	10 years
Principal	$ 300,000
Total long-term debt	$ 298,071		297,787
5.375% 30-year debentures due October 15, 2035
Long-term
Stated interest rate	5.375%	5.375%
Term of debt	30 years
Principal	$ 300,000
Total long-term debt	$ 297,245		297,058
6.60% 30-year notes due March 15, 2038
Long-term
Stated interest rate	6.60%	6.60%
Term of debt	30 years
Principal	$ 250,000
Total long-term debt	$ 248,477		248,392
5.375% 30-year notes due March 1, 2041
Long-term
Stated interest rate	5.375%	5.375%
Term of debt	30 years
Principal	$ 350,000
Total long-term debt	345,465		345,258
Other
Long-term
Total long-term debt	$ 16		$ 0