Consolidated Balance Sheets - USD ($) $ in Millions		Dec. 31, 2020		Dec. 31, 2019
Investments and cash:
Available for sale, fixed maturity securities		$ 105,882		$ 91,262
Held to maturity fixed maturity securities, net carrying amount	[1]	24,464
Held to maturity, fixed maturity securities		24,474		30,085
Equity securities		1,283		802
Commercial mortgage and other loans		10,554		9,569
Other investments		2,429		1,477
Cash and cash equivalents		5,141		4,896
Total investments and cash		149,753		138,091
Receivables		796		828
Accrued investment income		780		772
Deferred policy acquisition costs		10,441		10,128
Property and equipment, at cost less accumulated depreciation		601		581
Other		2,715		2,368
Assets		165,086		152,768
Policy liabilities:
Future policy benefits		97,783		90,335
Unpaid policy claims		5,187		4,659
Unearned premiums		3,597		4,243
Other policyholders' funds		7,824		7,317
Total policy liabilities		114,391		106,554
Income taxes		4,661		5,370
Payables for return of cash collateral on loaned securities		964		1,876
Notes payable and lease obligations		7,899		6,569
Other		3,612		3,440
Total liabilities		131,527		123,809
Commitments and contingent liabilities (Note 15)
Shareholders' equity:
Common stock of $.10 par value. In thousands: authorized 1,900,000 shares in 2020 and 2019; issued 1,351,018 shares in 2020 and 1,349,309 shares in 2019		135		135
Additional paid-in capital		2,410		2,313
Retained earnings		37,984		34,291
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains (losses)		(1,109)		(1,623)
Unrealized gains (losses) on fixed maturity securities		10,361		8,548
Unrealized gains (losses) on derivatives		(34)		(33)
Pension liability adjustment		(284)		(277)
Treasury stock, at average cost		(15,904)		(14,395)
Total shareholders' equity		33,559		28,959
Total liabilities and shareholders' equity		165,086		152,768
Consolidated Entity Excluding Variable Interest Entities (VIE)
Investments and cash:
Available for sale, fixed maturity securities		101,286		86,950
Variable Interest Entity, Consolidated
Investments and cash:
Available for sale, fixed maturity securities		4,596		4,312
Commercial mortgage and other loans		8,964	[2]	7,956
Other investments	[3]	826	[2]	494
Policy liabilities:
Total liabilities		$ 231	[2]	$ 126

[1] Net of allowance for credit losses

[2] Net of allowance for credit losses

[3] Consists entirely of alternative investments in limited partnerships