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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2020

Share-based Payment Arrangement [Abstract]

Schedule of Stock Option Activity

The following table summarizes stock option activity for the year ended December 31, 2020 (in millions except for per share amounts):

			Options						Weighted Average Exercise Price						Weighted Average Remaining Contractual Term (Years)						Aggregate Intrinsic Value
Balance, December 31, 2019			11						$	76.01					4.4						$	745
Granted			2						120.47
Exercised			(5)						68.14												$	348
Cancelled			—						115.47
Balance, December 31, 2020			8						$	88.01					3.8						$	464
Options exercisable at December 31, 2020			6						$	75.35					2.8						$	381

Schedule of Stock Option Valuation Assumptions

The weighted average fair value of options granted during the years ended December 31, 2020, 2019 and 2018, was $21.17, $19.25 and $16.07, respectively, using the Black-Scholes option pricing model with the assumptions below:

			2020						2019						2018
Risk free interest rate			0.4		%				2.2		%				2.5		%
Volatility			24.7		%				20.1		%				19.2		%
Dividend yield			1.2		%				1.2		%				1.3		%
Weighted average expected life (years)			4.1						4.1						4.2

Restricted Stock Unit, Activity

The following table summarizes the restricted stock units activity for the year ended December 31, 2020 (in millions except for per share amounts):

						Quantity						Weighted Average Fair Value
Balance, December 31, 2019						6						$	127.23
Granted						1						$	127.14
Vested						(2)						$	124.21
Forfeited						—						$	129.72
Balance, December 31, 2020						5						$	127.63

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Tabular disclosure of share-based payment arrangement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-Publisher FASB
-Name Accounting Standards Codification
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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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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