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Long-Term Debt - Schedule of Note Hedges (Details) - 2022 Note Hedge
shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2021
USD ($)
shares
Derivative [Line Items]  
Purchase | $ $ 128
Initial Shares (in shares) 6
Shares as of March 31, 2021 (in shares) 1