Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2015

Accumulated Other Comprehensive Income (Loss) [Abstract]

Changes in accumulated other comprehensive income (loss)

			Tax
			(Expense)
(In millions)	Pre-Tax		Benefit		After-Tax
2015
Net unrealized appreciation on securities, January 1,	$	955	$	(335)	$	620
Net unrealized (depreciation) on securities arising during the year		(389)		157		(232)
Reclassification adjustment for losses included in shareholders' net income (net realized investment gains)		46		(16)		30
Net unrealized (depreciation) on securities arising during the year		(343)		141		(202)
Net unrealized appreciation on securities, December 31,	$	612	$	(194)	$	418
Net unrealized (depreciation) on derivatives, January 1,	$	(12)	$	4	$	(8)
Net unrealized appreciation on derivatives arising during the year		10		(3)		7
Reclassification adjustment for losses included in shareholders' net income (other operating expenses)		12		(4)		8
Net unrealized appreciation on derivatives arising during the year		22		(7)		15
Net unrealized appreciation on derivatives, December 31,	$	10	$	(3)	$	7
Net translation of foreign currencies, January 1,	$	(71)	$	9	$	(62)
Net translation of foreign currencies arising during the year		(224)		12		(212)
Net translation of foreign currencies, December 31,	$	(295)	$	21	$	(274)
Postretirement benefits liability adjustment, January 1,	$	(2,286)	$	800	$	(1,486)
Reclassification adjustment for amortization of net losses from past experience and prior service costs (other operating expenses)		68		(23)		45
Net change due to valuation update		63		(23)		40
Net postretirement benefits liability adjustment arising during the year		131		(46)		85
Postretirement benefits liability adjustment, December 31,	$	(2,155)	$	754	$	(1,401)

			Tax
			(Expense)
(In millions)	Pre-Tax		Benefit		After-Tax
2014
Net unrealized appreciation on securities, January 1,	$	733	$	(256)	$	477
Net unrealized appreciation on securities arising during the year		249		(89)		160
Reclassification adjustment for (gains) included in shareholders' net income (net realized investment gains)		(27)		10		(17)
Net unrealized appreciation on securities arising during the year		222		(79)		143
Net unrealized appreciation on securities, December 31,	$	955	$	(335)	$	620
Net unrealized (depreciation) on derivatives, January 1,	$	(29)	$	10	$	(19)
Net unrealized appreciation on derivatives, arising during the year		17		(6)		11
Net unrealized (depreciation) on derivatives, December 31,	$	(12)	$	4	$	(8)
Net translation of foreign currencies, January 1,	$	91	$	(9)	$	82
Net translation of foreign currencies, arising during the year		(162)		18		(144)
Net translation of foreign currencies, December 31,	$	(71)	$	9	$	(62)
Postretirement benefits liability adjustment, January 1,	$	(1,630)	$	570	$	(1,060)
Reclassification adjustment for amortization of net losses from past experience
and prior service costs (other operating expenses)		54		(18)		36
Reclassification adjustment for settlement (other operating expenses)		6		(2)		4
Total reclassification adjustment to shareholders' net income (other operating expenses)		60		(20)		40
Net change due to valuation update		(716)		250		(466)
Net postretirement benefits liability adjustment arising during the year		(656)		230		(426)
Postretirement benefits liability adjustment, December 31,	$	(2,286)	$	800	$	(1,486)

			Tax
			(Expense)
(In millions)	Pre-Tax		Benefit		After-Tax
2013
Net unrealized appreciation on securities, January 1,	$	1,352	$	(465)	$	887
Net unrealized (depreciation) on securities arising during the year		(498)		166		(332)
Reclassification adjustment for (gains) included in net income (net realized investment gains)		(121)		43		(78)
Net unrealized (depreciation) on securities arising during the year		(619)		209		(410)
Net unrealized appreciation on securities, December 31,	$	733	$	(256)	$	477
Net unrealized depreciation on derivatives, January 1,	$	(43)	$	15	$	(28)
Net unrealized appreciation on derivatives arising during the year		14		(5)		9
Net unrealized depreciation on derivatives, December 31,	$	(29)	$	10	$	(19)
Net translation of foreign currencies, January 1,	$	91	$	(22)	$	69
Net translation of foreign currencies arising during the year		-		13		13
Net translation of foreign currencies, December 31,	$	91	$	(9)	$	82
Postretirement benefits liability adjustment, January 1,	$	(2,460)	$	861	$	(1,599)
Reclassification adjustment for amortization of net losses from past experience
and prior service costs (other operating expenses)		70		(25)		45
Reclassification adjustment for curtailment gain (other operating expenses)		(19)		7		(12)
Total reclassification adjustment to shareholders' net income (other operating expenses)		51		(18)		33
Net change due to valuation update and plan amendments		779		(273)		506
Net postretirement benefits liability adjustment arising during the year		830		(291)		539
Postretirement benefits liability adjustment, December 31,	$	(1,630)	$	570	$	(1,060)