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Stock-Based Compensation - Exercised Stock-Based Awards (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restricted Stock Units (RSUs)      
Stock-Based Compensation Details [Line Items]      
Total Intrinsic Value $ 30 $ 33 $ 55
Cash Received 0 0 0
Tax Benefit 5 5 11
Performance Shares      
Stock-Based Compensation Details [Line Items]      
Total Intrinsic Value 17 18 23
Cash Received 0 0 0
Tax Benefit 2 4 6
Stock options      
Stock-Based Compensation Details [Line Items]      
Cash Received 0 0 2
Tax Benefit 0 0 0
Total Intrinsic Value $ 0 $ 0 $ 1