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Leases (Narrative) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
renewal_option
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Operating Leased Assets [Line Items]      
Percentage of lease obligations 89.00%    
Term of contract 12 months    
Renewal term increments 1 year    
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Property, plant & equipment, net Property, plant & equipment, net  
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] Other current liabilities Other current liabilities  
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other liabilities Other liabilities  
Operating lease ROU asset amortization $ 38 $ 37 $ 38
Other noncash operating lease costs 13 $ 13 $ 16
Short-term lease commitments $ 416    
Minimum      
Operating Leased Assets [Line Items]      
Number of renewal options | renewal_option 1