Note 16 - Share Repurchase Programs (Details Textual) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended							6 Months Ended				36 Months Ended
	Feb. 18, 2022	May 26, 2021	Jun. 30, 2022	Mar. 31, 2022		Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	[1]	Jun. 30, 2022		Jun. 30, 2021		Mar. 31, 2022
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)			100,000,000	150,000,000						100,000,000				150,000,000
Treasury Stock, Shares, Acquired (in shares)			3,100,683	11,014,201	[1]		12,204,409	6,691,421		14,114,884	[2]	18,895,830	[2]	83,300,000
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)			$ 232.87	$ 249.95	[1],[3]		$ 222.46	$ 209.50	[3]	$ 246.20	[2]	$ 217.87	[2]
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess			$ 282				$ 3,115			$ 3,475		$ 4,517
Accelerated Share Repurchase Programs (ASRs) [Member]
Treasury Stock, Shares, Acquired (in shares)	7,012,232	7,209,156	1,847,185	7,012,232		1,983,859	7,209,156
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)										$ 248.32		$ 221.94
Treasury Stock, Value, Acquired, Cost Method, Including Amount Paid in Excess	$ 2,200	$ 2,000

[1] Includes 7,012,232 shares repurchased in 2022 under accelerated share repurchase programs.

[2] Includes 1,847,185 and 7,209,156 shares repurchased in 2022 and 2021, respectively, under accelerated share repurchase programs.

[3] In the period of the final settlement, the average price paid under the accelerated share repurchase programs is calculated based on the total program value less the value assigned to the initial delivery of shares. The average price of the initial settlement of the 2022 accelerated share repurchase programs was $250.99.