XML 85 R68.htm IDEA: XBRL DOCUMENT v3.22.0.1
Borrowings and Lines of Credit (Additional Information) (Details) - USD ($)
1 Months Ended 12 Months Ended
Apr. 30, 2020
Mar. 31, 2020
Aug. 31, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jun. 30, 2021
Debt Instrument [Line Items]              
Line of credit, amount outstanding       $ 0 $ 0    
Outstanding letters of credit and surety bonds       173,000,000 134,000,000    
Proceeds from revolving credit facility       0 800,000,000 $ 0  
Repayments of Lines of Credit       0 800,000,000 0  
Long-term debt       6,565,000,000 5,334,000,000    
Repayments of Medium-term Notes       $ 400,000,000 1,100,000,000 $ 0  
Non-callable Debentures 9 Percent Due 2021              
Debt Instrument [Line Items]              
Debt instrument, interest rate, stated percentage       9.00%     9.00%
Long-term debt       $ 0 134,000,000   $ 134,000,000
Unsecured Debt [Member] | Revolving Credit Facility [Member]              
Debt Instrument [Line Items]              
Proceeds from revolving credit facility   $ 800,000,000          
Repayments of Lines of Credit $ 800,000,000            
Debt Instrument, Term     5 years        
Long-term debt       0 $ 0    
Minimum              
Debt Instrument [Line Items]              
Periodic payment amount       50,000,000      
International Operations              
Debt Instrument [Line Items]              
Lines of credit, current borrowing capacity       492,000,000      
Line of credit, amount outstanding       $ 9,000,000