Insurance Subsidiary Financial Information and Regulatory Matters - Narrative (Details) - USD ($) $ in Millions	Jul. 03, 2018	Jun. 28, 2018	May 14, 2018	Sep. 30, 2018	Dec. 31, 2017
Statutory Accounting Practices [Line Items]
Change in statutory capital surplus				$ 110	$ 110
Non-permitted statutory accounting practices				(11)	(18)
Statutory capital and surplus				103	97
Increase (decrease) in statutory capital surplus				37	54
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries			$ 27
Intercompany Loans	$ 50
IOWA
Statutory Accounting Practices [Line Items]
Change in statutory capital surplus				$ 4	$ 5
F&G Re [Member]
Statutory Accounting Practices [Line Items]
Proceeds from Contributions from Parent	$ 50
F&G Life Re Ltd [Member]
Statutory Accounting Practices [Line Items]
Notes Issued		$ 65
FGLH [Member]
Statutory Accounting Practices [Line Items]
Proceeds from Contributions from Parent		65
FGL Insurance [Member]
Statutory Accounting Practices [Line Items]
Proceeds from Contributions from Parent		$ 125