Stockholders' Equity (Common Stock, Narrative) (Details) - USD ($)	1 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2019	Jan. 29, 2022	May 31, 2021
Stockholders' Equity Note [Abstract]
Stock repurchased program period	2 years	2 years
Stock repurchase program, approved amount	$ 1,900,000,000	$ 2,550,000,000		$ 1,500,000,000
Stock repurchase, planned amount		$ 1,407,000,000	$ 650,000,000