Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions		Mar. 31, 2021	Dec. 31, 2020
Available for sale, fixed maturity securities, amortized cost		$ 88,465	$ 91,630
Available for sale, fixed maturity securities, allowance for credit losses		27	38
Held to maturity, fixed maturity securities, fair value		28,056	30,399
Held-to-maturity, fixed maturity securities, allowance for credit losses		8	10
Commercial mortgage and other loans		10,847	10,554
Commercial mortgage and other loans, allowance for credit losses		154	180
Other investments		$ 2,666	$ 2,429
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)		1,352,279	1,351,018
Consolidated Entity Excluding Variable Interest Entities (VIE)
Available for sale, fixed maturity securities, amortized cost		$ 85,174	$ 88,143
Available for sale, fixed maturity securities, allowance for credit losses		27	38
Variable Interest Entity, Consolidated
Available for sale, fixed maturity securities, amortized cost	[1]	3,291	3,487	[2]
Commercial mortgage and other loans	[1]	9,210	8,964	[2]
Other investments	[1],[3]	$ 908	$ 826	[2]

[1] Net of allowance for credit losses

[2] Consists entirely of alternative investments in limited partnerships

[3] Consists entirely of alternative investments in limited partnerships