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Stockholders’ Equity - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Aug. 12, 2021
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Feb. 28, 2021
Jan. 31, 2020
Equity, Class of Treasury Stock [Line Items]              
Authorized repurchase amount           $ 4,000,000,000.0 $ 5,000,000,000.0
Payments for dividends   $ 121,000,000 $ 112,000,000 $ 243,000,000 $ 226,000,000    
Subsequent Event              
Equity, Class of Treasury Stock [Line Items]              
Authorized repurchase amount $ 3,000,000,000.0            
Dividends declared (in usd per share) $ 0.18