TREASURY STOCK

At March 31, 2019 and December 31, 2018, the Company had a total remaining authorization of $1.8 billion and $4.5 billion, respectively, to repurchase its common stock related to a program authorized by the Company's Board of Directors in 2018 for $8.0 billion. In the second quarter of 2019, the Company's Board of Directors authorized an additional program to repurchase up to $15.0 billion of the Company's common stock. The Company has continued to make repurchases of its common stock in the second quarter of 2019 and may continue to make repurchases of shares under its stock repurchase program, depending on prevailing market conditions, alternate uses of capital and other factors. Whether and when to initiate and/or complete any repurchase of common stock and the amount of common stock repurchased will be determined at the Company's discretion. Additionally, the Board of Directors has given the Company the general authorization to repurchase shares of its common stock withheld to satisfy employee withholding tax obligations related to stock-based compensation.

The following table summarizes the Company's stock repurchase activities during the three months ended March 31, 2019 and 2018, respectively (in millions, except for shares):



	Three Months Ended March 31, 2019			Three Months Ended March 31, 2018
	Shares	Amount		Shares	Amount
Authorized stock repurchase programs	1,548,083	$	2,735	314,076	$	612
General authorization for shares withheld on stock award vesting	70,705	121		59,043	120
Total	1,618,788	$	2,856	373,119	$	732

In the three months ended March 31, 2019, stock repurchases in March 2019 of 84,229 shares for an aggregate cost of $147 million were settled in April 2019. Stock repurchases in December 2018 of 42,939 shares for an aggregate cost of $74 million were settled in January 2019.

For the three months ended March 31, 2019 and 2018, the Company remitted employee withholding taxes of $111 million and $103 million, respectively, to the tax authorities, which is different from the aggregate cost of the shares withheld for taxes for each period due to the timing in remitting the taxes. The cash remitted to the tax authorities is included in financing activities in the Unaudited Consolidated Statements of Cash Flows.

At March 31, 2019, there were 18,935,914 shares of the Company's common stock held in treasury.