Debt - LT Debt (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Apr. 01, 2023	Mar. 31, 2023
Debt
Long-term debt	$ 2,153,553,000	$ 3,182,964,000
Accounts receivable, net	12,238,073,000	12,322,717,000
Long-term Debt, Maturities, Repayments of Principal in Year Two	550,700,000
Long-term Debt, Maturities, Repayments of Principal in Year Three	503,200,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	110,900,000
Long-term Debt, Maturities, Repayments of Principal in Year Five	500,200,000
Long-term Debt, Maturities, Repayments of Principal after Year Five	500,000,000.0
Investment income, interest and dividend	66,400,000	33,700,000	$ 14,700,000
Interest paid, net of interest and dividend income	274,100,000	175,600,000	113,100,000
Net proceeds from note offering	$ 496,268,000	0	$ 495,134,000
Interest rate swap | Fair value hedging
Debt
Derivative, variable interest rate	0.508%
Revolving Credit Facility
Debt
Maximum borrowing capacity	$ 2,000,000,000.0
Long-term debt	$ 0	0
Debt instrument, interest rate, effective percentage	6.42%
Facility fee	0.175%
Debt instrument, basis spread on variable rate	0.10%
Derivative, basis spread on variable rate	1.08%
North American asset securitization program
Debt
Maximum borrowing capacity	$ 1,500,000,000
Long-term debt	$ 198,000,000	1,235,000,000
Debt instrument, interest rate, effective percentage	5.85%
Facility fee	0.40%
Debt instrument, basis spread on variable rate	0.10%
Accounts receivable, net	$ 2,700,000,000	3,100,000,000
3.25% notes, due 2024
Debt
Long-term debt	0	498,122,000
Debt instrument, fair value	$ 0	$ 481,500,000
Debt instrument, interest rate, stated percentage	3.25%	3.25%
4.00% notes, due 2025
Debt
Long-term debt	$ 349,061,000	$ 348,344,000
Debt instrument, fair value	$ 343,500,000	$ 338,000,000
Debt instrument, interest rate, stated percentage	4.00%	4.00%
6.125% notes, due 2026
Debt
Long-term debt	$ 497,661,000	$ 0
Debt instrument, fair value	$ 502,000,000	$ 0
Debt instrument, face amount					$ 500,000,000.0
Debt instrument, interest rate, effective percentage	5.87%				6.125%
Debt instrument, interest rate, stated percentage	6.125%	6.125%
7.50% senior debentures, due 2027
Debt
Long-term debt	$ 110,184,000	$ 110,103,000
Debt instrument, fair value	$ 117,000,000	$ 116,500,000
Debt instrument, interest rate, stated percentage	7.50%	7.50%
3.875% notes, due 2028
Debt
Long-term debt	$ 497,098,000	$ 496,448,000
Debt instrument, fair value	$ 475,000,000	$ 456,000,000
Debt instrument, interest rate, stated percentage	3.875%	3.875%
2.95% notes, due 2032
Debt
Long-term debt	$ 495,039,000	$ 494,522,000
Debt instrument, fair value	$ 425,000,000	$ 395,500,000
Debt instrument, interest rate, stated percentage	2.95%	2.95%
Other Debt Obligations
Debt
Long-term debt	$ 6,510,000	$ 425,000
4.50% notes, due 2023
Debt
Debt instrument, interest rate, stated percentage				4.50%