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Stock-Based Compensation (Details 2) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Options outstanding and exercisable |  |  |
Excess Tax Benefit from Share-based Compensation, Operating Activities | $ 22 | $ 3 | $ 7
Options Outstanding, Weighted-Average Remaining Contractual Term | 3 years 6 months |  |
Options Outstanding, Aggregate Intrinsic Value | $ 75 |  |
Options Exercisable, Aggregate Intrinsic Value | $ 75 |  |
Closing stock price (in dollars per share) | $ 70.78 |  |
Restricted Stock |  |  |
Options outstanding and exercisable |  |  |
Granted, Weighted-Average Grant Date Fair Value (in dollars per share) | 49.28 | $ 27.51 | $ 41.84
Restricted Stock Units (RSUs) |  |  |
Options outstanding and exercisable |  |  |
Granted, Weighted-Average Grant Date Fair Value (in dollars per share) | $ 38.69 | 45.23 | 41.94
Performance Shares |  |  |
Options outstanding and exercisable |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 13 |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition | 1 year 7 months 6 days |  |
Granted, Weighted-Average Grant Date Fair Value (in dollars per share) | $ 48.25 | $ 47.93 | $ 43.09

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- Definition Amount of cash outflow for realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 20 -Section 55 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=122142933&loc=d3e11374-113907 + Details
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