Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Available for sale, fixed maturity securities, amortized cost		$ 79,371	$ 76,856
Held to maturity, fixed maturity securities, fair value		37,594	36,722
Commercial mortgage and other loans		9,569	6,919
Other investments		$ 1,477	$ 787
Common stock, par value (in dollars per share)		$ 0.10	$ 0.10
Common stock, shares authorized (in shares)		1,900,000	1,900,000
Common stock, shares issued (in shares)		1,349,309	1,347,540
Asset derivatives		$ 482	$ 417
Liability derivatives		586	387
Variable Interest Entity, Consolidated
Available for sale, fixed maturity securities, amortized cost		3,308	3,849
Commercial mortgage and other loans		7,956	5,528
Other investments	[1]	494	328
Asset derivatives	[2]	169	182
Liability derivatives	[2]	126	102
Consolidated Entity Excluding Variable Interest Entities (VIE)
Available for sale, fixed maturity securities, amortized cost		$ 76,063	$ 73,007

[1] Consists entirely of alternative investments in limited partnerships

[2] Consists entirely of derivatives