Aggregate dividends declared during the period for each share of common stock outstanding.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

Subsequent Events (Details) - $ / shares		3 Months Ended								12 Months Ended
Subsequent Events (Details) - $ / shares	Feb. 08, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Subsequent Event
Dividends per share, common stock (in dollars per share)		$ 0.34	$ 0.34	$ 0.29	$ 0.29	$ 0.29	$ 0.29	$ 0.27	$ 0.27	$ 1.26	$ 1.12	$ 1.02
Subsequent event
Subsequent Event
Dividends per share, common stock (in dollars per share)	$ 0.34