Capital Stock and Earnings Per Share - Par Value and Shares Authorized (Details) - $ / shares	Dec. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Common Stock, Par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares authorized (in shares)	2,000,000,000	2,000,000,000
OMH
Class of Stock [Line Items]
Preferred/Special Stock, Par value (in dollars per share)	$ 0.01
Common Stock, Par value (in dollars per share)	$ 0.01
Preferred/Special Stock, Shares authorized (in shares)	300,000,000
Common Stock, Shares authorized (in shares)	2,000,000,000
OMFC
Class of Stock [Line Items]
Preferred/Special Stock, Par value (in dollars per share)	$ 0
Common Stock, Par value (in dollars per share)	$ 0.50	$ 0.50
Preferred/Special Stock, Shares authorized (in shares)	25,000,000
Common Stock, Shares authorized (in shares)	25,000,000	25,000,000