Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Available for sale, fixed maturity securities, amortized cost		$ 76,856	[1],[2]	$ 75,132	[3]
Held to maturity, fixed maturity securities, fair value		$ 36,722		$ 38,072
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)		1,347,540		1,345,762
Asset derivatives		$ 417		$ 331
Liability derivatives		387		474
Variable Interest Entity, Consolidated
Available for sale, fixed maturity securities, amortized cost	[4]	3,849		4,538
Asset derivatives	[5]	182		151
Liability derivatives	[5]	102		128
Consolidated Entity Excluding Variable Interest Entities (VIE)
Available for sale, fixed maturity securities, amortized cost		73,007		70,594
Held to maturity, fixed maturity securities, fair value		36,722		38,072
Loan receivables and limited partnerships | Variable Interest Entity, Consolidated
Other investments held in unit trust, net of reserves, amortized cost		$ 5,856		$ 2,341

[1] Includes perpetual securities ($1,139 at amortized cost and $1,140 at fair value)

[2] Includes perpetual securities, categorized in accordance with their respective economic maturities (the expected maturity date created by the combination of features in the financial instrument)

[3] Includes perpetual securities ($1,462 at amortized cost and $1,789 at fair value)

[4] Includes perpetual securities

[5] Consists entirely of derivatives