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v3.20.4

Shareholders' Equity (Deficit) (Narrative) (Details) - USD ($) $ in Millions | Mar. 12, 2021 | Jan. 30, 2021 | Mar. 31, 2018
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Subsequent Event |  |  |
Stock repurchase Program, Authorized Amount | $ 500 |  |
March 2018 Repurchase Program [Member] |  |  |
Stock repurchase Program, Authorized Amount |  |  | $ 250
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  | $ 79 |
September 2017 Repurchase Program [Member] |  |  |
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  |  | $ 23
Share Repurchase 10b5-1 Plan | Subsequent Event |  |  |
Stock repurchase Program, Authorized Amount | $ 250 |  |

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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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