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Note 4 - Long-term Debt (Details Textual) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Feb. 19, 2021
Jan. 02, 2019
Interest Paid, Excluding Capitalized Interest, Operating Activities $ 89 $ 95    
2026 Notes [Member]        
Debt Instrument, Interest Rate, Stated Percentage 5.875%      
2027 Notes [Member]        
Debt Instrument, Interest Rate, Stated Percentage 7.00%      
2030 Notes [Member]        
Debt Instrument, Interest Rate, Stated Percentage 4.75%      
The Amended 2019 Senior Credit Facility [Member]        
Debt Instrument, Commitments $ 2,100      
The Amended 2019 Senior Credit Facility [Member] | The 2017 Term Loan [Member]        
Debt Instrument, Commitments 595      
The Amended 2019 Senior Credit Facility [Member] | The 2019 Term Loan [Member]        
Debt Instrument, Commitments 1,200      
The Amended 2019 Senior Credit Facility [Member] | Revolving Credit Facility [Member]        
Line of Credit Facility, Maximum Borrowing Capacity     $ 300 $ 200
Debt Instrument, Commitments $ 299      
The 2019 Senior Credit Facility [Member] | The 2019 Term Loan [Member]        
Debt Instrument, Interest Rate, Effective Percentage 2.60%      
The 2017 Senior Credit Facility [Member] | The 2017 Term Loan [Member]        
Debt Instrument, Interest Rate, Effective Percentage 2.30%