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Debt - Credit Facilities (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Long-term debt, gross $ 3,650,000,000 $ 3,650,000,000
Credit Agreement as Amended    
Debt Instrument [Line Items]    
Amount of letters of credit that can be issued under the Revolver $ 50,000,000  
Line of Credit    
Debt Instrument [Line Items]    
Debt covenant, consolidated total net debt ratio, maximum 375.00%  
Debt instrument, covenant, consolidated total net debt ratio, qualifying acquisition 425.00%  
Debt instrument, covenant, consolidated total assets ratio, maximum 7.50%  
Unsecured Notes | The Notes    
Debt Instrument [Line Items]    
Redemption price percentage 101.00%  
Unsecured Notes | The Notes | Debt Instrument, Redemption, Period One    
Debt Instrument [Line Items]    
Redemption price percentage 100.00%  
Revolving Credit Facility    
Debt Instrument [Line Items]    
Maximum borrowing capacity $ 1,500,000,000 $ 1,500,000,000
Revolving Credit Facility | Line of Credit | Credit Agreement as Amended    
Debt Instrument [Line Items]    
Amount drawn on the revolver $ 0  
Revolving Credit Facility | Line of Credit | Credit Agreement as Amended | Federal Funds Rate    
Debt Instrument [Line Items]    
Base rate margin 0.50%  
Revolving Credit Facility | Line of Credit | Credit Agreement as Amended | LIBOR    
Debt Instrument [Line Items]    
Base rate margin 1.00%  
Variable rate interest floor 0.00%  
Revolving Credit Facility | Line of Credit | Credit Agreement as Amended | LIBOR | Minimum    
Debt Instrument [Line Items]    
Applicable margin (as a percent) 0.875%  
Revolving Credit Facility | Line of Credit | Credit Agreement as Amended | LIBOR | Maximum    
Debt Instrument [Line Items]    
Applicable margin (as a percent) 1.375%  
Revolving Credit Facility | Line of Credit | Credit Agreement as Amended | Base Rate    
Debt Instrument [Line Items]    
Variable rate interest floor 1.00%  
Revolving Credit Facility | Line of Credit | Credit Agreement as Amended | Base Rate | Minimum    
Debt Instrument [Line Items]    
Applicable margin (as a percent) 0.00%  
Revolving Credit Facility | Line of Credit | Credit Agreement as Amended | Base Rate | Maximum    
Debt Instrument [Line Items]    
Applicable margin (as a percent) 0.375%