Note 12 - Debt - Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current portion of long-term debt	$ 55	$ 81
Short-term borrowings		75
Current portion of long-term debt and short-term borrowings	55	156
Total long-term debt, including current portion	7,044	7,897
Long-term debt	6,989	7,816
Debentures 8.875 Due 2021 [Member]
Debentures		63
Debentures 29% Due 2022 [Member]
Debentures		374
Debentures, 3.70%, due 2023 [Member]
Debentures		249
Medium-Term Notes, Average Rate 7.66%, Due Through 2023 [Member]
Debentures	45	45
Debentures 3.9 Due 2049 [Member]
Debentures	395	394
Debentures 5.45 Due 2079 [Member]
Debentures	1,086	1,084
Yen-denominated Debentures, 0.698%, due 2024 [Member]
Debentures	182	203
Yen-denominated Debentures, 0.722%, due 2025 [Member]
Debentures	87	96
Yen-denominated Debentures, .992%, due 2027 [Member]
Debentures	407	453
Yen-denominated Debentures, 1.043%, due 2028 [Member]
Debentures	264	293
Yen Denominated Debentures, 1.153 Due 2031 [Member]
Debentures	270	301
Yen Denominated Debentures, 1.513 Due 2039 [Member]
Debentures	51	56
Debentures, 6.85%, Due 2029 [Member]
Debentures	160	161
Yen-denominated Debentures, 1.219%, due 2030 [Member]
Debentures	216	239
Debentures, Callable, 7.25%, Due 2036 [Member]
Debentures	249	249
Debentures, 4.70%, Due 2037 [Member]
Debentures	296	296
Yen-denominated Debentures, 1.583%, due 2037 [Member]
Debentures	86	96
Debentures, 5.75%, Due 2040 [Member]
Debentures	396	396
Debentures, 4.75%, Due 2042 [Member]
Debentures	496	496
Debentures, 5.35%, due 2048 [Member]
Debentures	544	543
Debentures, 4.375%, due 2057 [Member]
Debentures	743	743
Debentures, 5.85%, due 2068 [Member]
Debentures	297	296
Financing Leases, Average Discount Rate 5.7%, Due Through 2044 [Member]
Debentures	183	173
Other Debt, Average Rate of 4.33% Due Through 2043 [Member]
Debentures	$ 591	$ 598