Share-Based Compensation (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair And Intrinsic Value Of Restricted Stock Units [Table Text Block] | The fair value of vested RSUs and RSSs as well as the compensation cost for the years ended December 31 were as follows (in millions):
(a) Net of tax benefit of $113 million, $104 million, and $100 million in 2022, 2023, and 2024, respectively.
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| Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | Inputs and assumptions used to calculate the fair value at grant date through a Monte Carlo simulation were as follows:
(a)Expected volatility based on three years of daily closing share price changes ending on the grant date.
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| Restricted Stock Units Activity [Table Text Block] | During 2024, activity for RSUs and RSSs was as follows (in millions, except for weighted-average fair value):
(a)Includes shares awarded to non-employee directors. (b)Excludes 1,285,271 non-employee director shares that were vested but unissued at December 31, 2024.
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