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v3.21.1

Stock-Based Compensation - RSU, RS, Performance Shares (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Restricted Stock and Restricted Stock Units |  |
Unit and Shares Activity: |  |
Number of Shares - Nonvested - Beginning balance | 1,722,000 |
Number of Shares - Granted - Annual | 721,000 |
Number of Shares - Vested | (433,000) |
Number of Shares - Forfeited | (33,000) |
Number of Shares - Nonvested - Ending balance | 1,977,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures |  |
Weighted Average Grant Date Fair Value - Nonvested - Beginning balance | $ 189.78 |
Weighted Average Grant Date Fair Value - Granted - Annual | 175.09 |
Weighted Average Grant Date Fair Value - Vested | 232.62 |
Weighted Average Grant Date Fair Value - Forfeited | 173.54 |
Weighted Average Grant Date Fair Value - Nonvested - Ending balance | $ 175.31 |
Compensation expense yet to be recognized | $ 141 |
Expense recognition period | 27 months |
Fair value that vested | $ 78 | $ 88
Tax benefit realized from vesting | $ 14 | 16
Vesting or performance period | 3 years |
Value of dividend equivalents for restricted stock units that are forfeited | $ 0 |
Impact on basic earnings per share due to restricted stock units dividends | $ 0 |
Performance Shares |  |
Unit and Shares Activity: |  |
Number of Shares - Nonvested - Beginning balance | 423,000 |
Number of Shares - Granted - Annual | 163,000 |
Number of Shares - Distributed | (115,000) |
Number of Shares - Performance Change | 17,000 |
Number of Shares - Forfeited | (4,000) |
Number of Shares - Nonvested - Ending balance | 484,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures |  |
Weighted Average Grant Date Fair Value - Nonvested - Beginning balance | $ 188.61 |
Weighted Average Grant Date Fair Value - Granted - Annual | $ 176.41 |
Weighted Average Grant Date Fair Value - Distributed | 228.80 |
Weighted Average Grant Date Fair Value - Performance Change | $ 178.43 |
Weighted Average Grant Date Fair Value - Forfeited | 172.92 |
Weighted Average Grant Date Fair Value - Nonvested - Ending balance | $ 174.75 |
Compensation expense yet to be recognized | $ 40 |
Expense recognition period | 21 months |
Fair value that vested | $ 22 | 35
Tax benefit realized from vesting | $ 4 | $ 7
Vesting or performance period | 3 years |
Performance shares awarded at estimated number of shares at the end of the performance period | 100.00% |
Performance Shares | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures |  |
Expense recognition period | 3 years |
Number of shares to be delivered based on percent of each performance share granted upon satisfaction of performance conditions | 200.00% |
Performance Shares | Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures |  |
Expense recognition period | 1 year |
Number of shares to be delivered based on percent of each performance share granted upon satisfaction of performance conditions | 0.00% |

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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