Stockholder's Equity (Tables)

12 Months Ended

Dec. 31, 2021

Stockholders' Equity Note [Abstract]

Common stock activity

The following summarizes Common Stock activity for each of the years ended December 31, 2021, 2020 and 2019 (in thousands):

	Common Shares
	Issued	Treasury	Outstanding
Balance at December 31, 2018	580,408	(385)	580,023
Common Stock Issued Under Stock-Based Compensation Plans	1,688	—	1,688
Treasury Stock Purchased (1)	—	(310)	(310)
Common Stock Issued Under Employee Stock Purchase Plan	117	107	224
Treasury Stock Issued Under Stock-Based Compensation Plans	—	289	289
Balance at December 31, 2019	582,213	(299)	581,914
Common Stock Issued Under Stock-Based Compensation Plans	1,482	—	1,482
Treasury Stock Purchased (1)	—	(389)	(389)
Common Stock Issued Under Employee Stock Purchase Plan	—	377	377
Treasury Stock Issued Under Stock-Based Compensation Plans	—	187	187
Balance at December 31, 2020	583,695	(124)	583,571
Common Stock Issued Under Stock-Based Compensation Plans	1,511	—	1,511
Treasury Stock Purchased (1)	—	(504)	(504)
Common Stock Issued Under Employee Stock Purchase Plan	316	—	316
Treasury Stock Issued Under Stock-Based Compensation Plans	—	371	371
Balance at December 31, 2021	585,522	(257)	585,265

(1)    Represents shares that were withheld by or returned to EOG (i) in satisfaction of tax withholding obligations that arose upon the exercise of employee stock options or SARs or the vesting of restricted stock, restricted stock unit or performance unit grants or (ii) in payment of the exercise price of employee stock options.