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Note 2. Lease Accounting Policy Supplemental Balance Sheet Information Related to Leases (Details)
$ in Millions
Jun. 30, 2019
USD ($)
Supplemental Balance Sheet Information Related to Leases [Line Items]  
Operating Lease, Right-of-Use Asset $ 663
Operating Lease, Weighted Average Remaining Lease Term 12 years 1 month 4 days
Finance Lease, Weighted Average Remaining Lease Term 11 years 11 months 2 days
Operating Lease, Liability $ 727
UNITED STATES  
Supplemental Balance Sheet Information Related to Leases [Line Items]  
Operating Lease, Right-of-Use Asset 282
Operating Lease, Liability $ 333