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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Stock Option Activity [Table Text Block]

Stock option activity for the year ended December 31, 2020 is summarized in the table below:

			Shares						Weighted- Average Exercise Price						Weighted- Average Remaining Contractual Life						Aggregate Intrinsic Value
			(in millions)												(in years)						(in millions)
Outstanding at beginning of period			32						$	166
Granted			7						311
Exercised			(10)						126
Forfeited			(1)						255
Outstanding at end of period			28						211						6.6						$	3,937
Exercisable at end of period			13						150						5.0						2,579
Vested and expected to vest, end of period			27						210						6.5						3,892

Restricted Share Activity [Table Text Block]

Restricted share activity for the year ended December 31, 2020 is summarized in the table below:

(shares in millions)						Shares						Weighted-Average Grant Date Fair Value per Share
Nonvested at beginning of period						5						$	207
Granted						1						303
Vested						(2)						187
Nonvested at end of period						4						256

Other Share-Based Compensation Data [Table Text Block]

Other Share-Based Compensation Data

(in millions, except per share amounts)						For the Years Ended December 31,
						2020						2019						2018
Stock Options
Weighted-average grant date fair value of shares granted, per share						$	54					$	46					$	43
Total intrinsic value of stock options exercised						1,736						1,398						1,431
Restricted Shares
Weighted-average grant date fair value of shares granted, per share						303						259						229
Total fair value of restricted shares vested						$	574					$	545					$	521
Employee Stock Purchase Plan
Number of shares purchased						1						1						2
Share-Based Compensation Items
Share-based compensation expense, before tax						$	679					$	697					$	638
Share-based compensation expense, net of tax effects						619						641						587
Income tax benefit realized from share-based award exercises						208						201						239

(in millions, except years)						December 31, 2020
Unrecognized compensation expense related to share awards						$	805
Weighted-average years to recognize compensation expense						1.4

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The principal assumptions the Company used in calculating grant-date fair value for stock options were as follows:

						For the Years Ended December 31,
						2020						2019						2018
Risk-free interest rate						0.2% - 1.4%						1.5% - 2.5%						2.6% - 3.1%
Expected volatility						22.2% - 29.5%						19.4% - 21.6%						18.7% - 19.3%
Expected dividend yield						1.4% - 1.7%						1.4% - 1.8%						1.3% - 1.5%
Forfeiture rate						5.0%						5.0%						5.0%
Expected life in years						5.1						5.3						5.6

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Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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