Weighted Average Shares Outstanding (Tables)

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

	Three Months Ended June 30,		Six Months Ended June 30,
(in millions)	2021	2020	2021	2020
Weighted average shares outstanding - basic	1,421.3	1,410.9	1,420.0	1,404.1
Net effect of common stock equivalents	11.2	—	11.7	—
Weighted average shares outstanding - assuming dilution	1,432.5	1,410.9	1,431.7	1,404.1

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following securities were excluded from the calculation of weighted average shares outstanding - assuming dilution because their effect in the periods presented below would have been anti-dilutive:

	Three Months Ended June 30,		Six Months Ended June 30,
(in millions)	2021	2020	2021	2020
Common stock equivalents(1)	0	13	0	14
Stock options outstanding(2)	3	6	6	6
MCPS(3)	24	9	24	5

(1)    Represents common stock equivalents pursuant to our employee stock-based compensation plans, which are anti-dilutive in the second quarter and first six months of 2020 due to our Net loss position in those periods.    

(2)    Represents stock options outstanding pursuant to our employee stock-based compensation plans with exercise prices that were greater than the average fair market value of our common stock for the related periods.

(3)    Represents common stock issuable upon the conversion of MCPS. Refer to Note I – Stockholders' Equity for additional information.