Debt - LT Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt	$ 3,182,964	$ 2,244,443
Accounts receivable, net	12,322,717	11,123,946
Long-term Debt, Maturities, Repayments of Principal in Year Two	498,400
Long-term Debt, Maturities, Repayments of Principal in Year Three	1,600,000
Long-term Debt, Maturities, Repayments of Principal in Year Four	0
Long-term Debt, Maturities, Repayments of Principal in Year Five	110,100
Long-term Debt, Maturities, Repayments of Principal after Year Five	991,000
Investment Income, Interest and Dividend	33,700	14,700	$ 22,600
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	175,600	113,100	138,300
Net proceeds from note offering	0	495,134	$ 0
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum Borrowing Capacity	$ 2,000,000
Debt Instrument, Interest Rate, Effective Percentage	4.79%
Facility Fee	0.175%
Debt Instrument, Basis Spread on Variable Rate	1.08%
North American Asset Securitization Program [Member]
Debt Instrument [Line Items]
Maximum Borrowing Capacity	$ 1,500,000
Long-term debt	$ 1,235,000	0
Debt Instrument, Interest Rate, Effective Percentage	4.86%
Facility Fee	0.40%
Debt Instrument, Basis Spread on Variable Rate	0.10%
Accounts receivable, net	$ 3,100,000	2,700,000
3.50% Notes, Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.50%
4.50% Notes, Due 2023 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 0	299,283
Debt Instrument, Fair Value	$ 0	309,000
Debt Instrument, Interest Rate, Stated Percentage	4.50%
3.25% Notes, Due 2024 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 498,122	497,060
Debt Instrument, Fair Value	$ 481,500	522,000
Debt Instrument, Interest Rate, Stated Percentage	3.25%
4.00% Notes, Due 2025 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 348,344	347,657
Debt Instrument, Fair Value	$ 338,000	374,000
Debt Instrument, Interest Rate, Stated Percentage	4.00%
7.50% Senior Debentures, Due 2027 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 110,103	110,021
Debt Instrument, Fair Value	$ 116,500	136,000
Debt Instrument, Interest Rate, Stated Percentage	7.50%
3.875% Notes, Due 2028 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 496,448	495,823
Debt Instrument, Fair Value	$ 456,000	542,500
Debt Instrument, Interest Rate, Stated Percentage	3.875%
Other obligations with various interest rates and due dates [Member]
Debt Instrument [Line Items]
Other Notes Payable, Noncurrent	$ 425	577
Notes Due in 2032 - 2.95%
Debt Instrument [Line Items]
Long-term debt	494,522	494,022
Debt Instrument, Fair Value	$ 395,500	$ 504,500
Debt Instrument, Interest Rate, Stated Percentage	2.95%