Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Stockholders' Equity Stock Repurchase Program (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jan. 29, 2020	Jan. 28, 2016
2016 Stock Repurchase Program
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 12,000
Stock Repurchased and Retired During Period, Shares	19	12
Stock Repurchased and Retired During Period, Value	$ 1,300	$ 834
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 2,100
2020 Stock Repurchase Program
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount			$ 5,000