Financial Statement Information Treasury Stock (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Treasury Stock [Abstract]
Stock Repurchase Program, Authorized Amount	$ 2,000
Stock Repurchased During Period, Shares	2.7
Payments for Repurchase of Common Stock	$ 144	$ 57
Stock Repurchase Program Remaining Authorized Repurchases, Amount	510
Purchase of treasury stock	$ (144)	$ (57)