CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Available for sale securities, allowance for credit losses	$ 22,000,000	$ 0
Available-for-sale securities, pledged securities, secured trust deposits	451,000,000	410,000,000
Allowance for credit loss	35,000,000
Short-term investments, pledged, secured trust deposits	4,000,000	12,000,000
Cash, pledged, secured trust deposits	389,000,000	384,000,000
Allowance for doubtful accounts, premiums and other receivables	28,000,000	$ 20,000,000
Expected credit losses on reinsurance recoverable	$ 22,000,000
Common stock, par or stated value per share (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	600,000,000	600,000,000
Common stock, shares, outstanding (in shares)	293,649,504	275,563,436
Common stock, shares, issued (in shares)	320,759,086	292,236,476
Preferred stock, par or stated value per share (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Treasury stock (in shares)	27,109,582	16,673,040
ServiceLink Holdings, LLC
Redeemable non-controlling interest, ownership percentage	21.00%	21.00%