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Debt - 2029 and 2049 Notes Issued in 2019 (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2022
Debt Instrument        
Long-term debt, gross $ 2,600,000,000     $ 2,600,000,000
Senior Notes        
Debt Instrument        
Proceeds from offering $ 698,700,000 $ 669,100,000 $ 693,300,000  
Senior Notes | 2029 Notes        
Debt Instrument        
Aggregate principal amount     $ 375,000,000  
Stated interest rate     4.25% 4.25%
Stated coupon rate     99.691%  
Yield to maturity 4.288%   4.288% 4.288%
Long-term debt, gross $ 375,000,000.0     $ 375,000,000.0
Senior Notes | 2029 Notes | Prior to February 15, 2029        
Debt Instrument        
Stated coupon rate     100.00%  
Senior Notes | 2029 Notes | On or after February 15, 2029        
Debt Instrument        
Stated coupon rate     100.00%  
Senior Notes | 2029 Notes | On or after February 15, 2029 | Minimum        
Debt Instrument        
Redemption price, notice period     15 days  
Senior Notes | 2029 Notes | On or after February 15, 2029 | Maximum        
Debt Instrument        
Redemption price, notice period     60 days  
Senior Notes | 2049 Notes        
Debt Instrument        
Aggregate principal amount     $ 325,000,000  
Stated interest rate     5.25% 5.25%
Stated coupon rate     98.32%  
Yield to maturity 5.103%   5.363% 5.103%
Long-term debt, gross $ 625,000,000.0     $ 625,000,000.0
Senior Notes | 2049 Notes | Prior to November 15, 2048        
Debt Instrument        
Stated coupon rate     100.00%  
Senior Notes | 2049 Notes | On or after November 15, 2048        
Debt Instrument        
Stated coupon rate     100.00%  
Senior Notes | 2049 Notes | On or after November 15, 2048 | Minimum        
Debt Instrument        
Redemption price, notice period     15 days  
Senior Notes | 2049 Notes | On or after November 15, 2048 | Maximum        
Debt Instrument        
Redemption price, notice period     60 days  
Senior Notes | 2024 Notes        
Debt Instrument        
Stated interest rate     5.375%  
Stated coupon rate     102.688%  
Long-term debt, gross     $ 325,000,000