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Note 1 - Description of Business and Summary of Significant Accounting Policies - Disposal of Assets and Purchase of Property and Equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Proceeds from sale of assets $ 9 $ 253 $ 9
Proceeds from Repack reimbursement (Note 1) 29 41 14
Net book value of assets disposed (9) (240) (6)
Total 29 54 17
Recurring purchases - operations 87 89 41
Repack 23 20 27
Repack related 0 1 2
Total $ 110 $ 110 $ 70