Stockholders' Equity (Table Text Block)	6 Months Ended
Sep. 30, 2021
Stockholders' Equity [Abstract]
Common stock dividends	Common Stock Dividends Declared Date Per Share Amount Record Date Dividend Date June 9, 2021 $ 0.50 June 24, 2021 July 8, 2021 August 19, 2021 $ 0.50 September 7, 2021 September 21, 2021 October 6, 2021$ 0.50 October 18, 2021 October 29, 2021

Tabular disclosure of changes in the separate accounts comprising stockholders' equity (in addition to retained earnings) and of the changes in the number of shares of equity securities during at least the most recent annual fiscal period and any subsequent interim period presented is required to make the financial statements sufficiently informative if both financial position and results of operations are presented.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644

Name:	us-gaap_ScheduleOfStockholdersEquityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration