Stockholders' Equity - Dividend Limitations (Details) - Principal Life Insurance Company Only $ in Millions	12 Months Ended
Dec. 31, 2023 USD ($)
Dividend Limitations
Dividend limitation as percentage of statutory policyholder surplus (as a percent)	10.00%
Dividends that can be paid in upcoming calendar year without exceeding statutory limitation	$ 1,497.8

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

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