Note 12 - Financing Agreements - Debt Instrument Redemption (Details)			9 Months Ended
	May 28, 2021	May 13, 2021	Sep. 30, 2021
Senior Notes due November 15, 2027 [Member]
2021			100.00%
Senior Notes due June 15, 2028 [Member]
2021			100.00%
Senior Notes Due July 15, 2029 [Member]
2021	100.00%
Senior Notes DueSeptember 1, 2030 [Member]
2021		100.00%
Debt Instrument, Redemption, Period Two [Member] \| Senior Notes due April 15, 2025 [Member]
2021			102.875%
Debt Instrument, Redemption, Period Three [Member] \| Senior Notes due April 15, 2025 [Member]
2021			101.438%
Debt Instrument, Redemption, Period Three [Member] \| Senior Notes due November 15, 2027 [Member]
2021			102.688%
Debt Instrument, Redemption, Period Four [Member] \| Senior Notes due April 15, 2025 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Four [Member] \| Senior Notes due November 15, 2027 [Member]
2021			101.344%
Debt Instrument, Redemption, Period Four [Member] \| Senior Notes due June 15, 2028 [Member]
2021			102.813%
Debt Instrument, Redemption, Period Five [Member] \| Senior Notes due April 15, 2025 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Five [Member] \| Senior Notes due November 15, 2027 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Five [Member] \| Senior Notes due June 15, 2028 [Member]
2021			101.406%
Debt Instrument, Redemption, Period Five [Member] \| Senior Notes Due July 15, 2029 [Member]
2021			101.50%
Debt Instrument, Redemption, Period Six [Member] \| Senior Notes due November 15, 2027 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Six [Member] \| Senior Notes due June 15, 2028 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Six [Member] \| Senior Notes Due July 15, 2029 [Member]
2021			100.75%
Debt Instrument, Redemption, Period Seven [Member] \| Senior Notes due November 15, 2027 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Seven [Member] \| Senior Notes due June 15, 2028 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Seven [Member] \| Senior Notes Due July 15, 2029 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Seven [Member] \| Senior Notes DueSeptember 1, 2030 [Member]
2021			102.125%
Debt Instrument, Redemption, Period Eight [Member] \| Senior Notes due June 15, 2028 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Eight [Member] \| Senior Notes Due July 15, 2029 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Eight [Member] \| Senior Notes DueSeptember 1, 2030 [Member]
2021			101.417%
Debt Instrument, Redemption, Period Nine [Member] \| Senior Notes Due July 15, 2029 [Member]
2021			100.00%
Debt Instrument, Redemption, Period Nine [Member] \| Senior Notes DueSeptember 1, 2030 [Member]
2021			100.708%
Debt Instrument, Redemption, Period Ten [Member] \| Senior Notes DueSeptember 1, 2030 [Member]
2021			100.00%