CONSOLIDATED CONDENSED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2020		Dec. 31, 2019
Investments:
Fixed maturities, amortized cost	$ 38,059		$ 38,157
Fixed maturities, amortized cost, allowance for credit loss	49	[1]	0
Equity securities, cost	1,446		1,244
Other invested assets, primarily mortgage loans, allowance for credit loss	$ 20		$ 0
Liabilities and Equity:
Preferred stock, par value (in dollars per share)	$ 0.10		$ 0.10
Preferred stock, shares authorized (in shares)	100,000,000		100,000,000
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01
Common stock, shares authorized (in shares)	1,800,000,000		1,800,000,000
Common stock, shares issued (in shares)	291,381,794		291,210,222
Treasury stock, shares (in shares)	9,951,322		240,000

[1] On January 1, 2020, the Company adopted ASU 2016-13; see Note 1. The Unrealized OTTI Losses (Gains) column that tracked subsequent valuation changes on securities for which a credit loss had previously been recorded has been replaced with the Allowance for Credit Losses column. Prior period amounts were not adjusted for the adoption of this standard.