LT Debt (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Text Block]

Long-term debt consists of the following at December 31:

	2021		2020
3.50% notes, due 2022	$	—	$	348,918
4.50% notes, due 2023	299,283		298,701
3.25% notes, due 2024	497,060		496,034
4.00% notes, due 2025	347,657		346,999
7.50% senior debentures, due 2027	110,021		109,939
3.875% notes, due 2028	495,823		495,223
2.95% notes, due 2032	494,022		—
Other obligations with various interest rates and due dates	577		2,126
	$	2,244,443	$	2,097,940

Schedule of Fair Value of Debt [Text Block]

The estimated fair market value of long-term debt at December 31, using quoted market prices, is as follows:

	2021		2020
4.50% notes, due 2023	$	309,000	$	321,500
3.25% notes, due 2024	522,000		540,500
4.00% notes, due 2025	374,000		383,000
7.50% senior debentures, due 2027	136,000		140,000
3.875% notes, due 2028	542,500		564,000
2.95% notes, due 2032	504,500		—