(Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Statutory Financial Information and Dividend Limitations
Statutory net income (loss)	$ 279	$ 192	$ (67)
Statutory capital and surplus	3,410	3,050
Dividends paid	600	$ 0	$ 17
Maximum amount of dividends ALIC able to pay without prior IL DOI approval	847
Deficit position used to determine payment of dividends	$ 308
Multiplier of authorized control level RBC to determine action level RBC	2
Statutory accounting practices, statutory capital and surplus, adjusted balance	$ 3,780
Authorized control level RBC	$ 568