Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments - tax effect	$ (29)	$ (38)	$ 111	$ 25
Distribution of WarnerMedia, net of taxes of $0, $0, $0 and $(38)	0	0	0	(38)
Net unrealized gains (losses), net of taxes of $(12), $(15), $(8) and $(52)	(12)	(15)	(8)	(52)
Reclassification adjustment included in net income, net of taxes of $1, $1, $3 and $3	1	1	3	3
Net unrealized gains (losses), net of taxes of $211, $(143), $213 and $(246)	211	(143)	213	(246)
Reclassification adjustment included in net income, net of taxes of $3, $3, $9 and $22	3	3	9	22
Distribution of WarnerMedia, net of taxes of $0, $0, $0 and $(12)	0	0	0	(12)
Net prior service credit arising during the period, net of taxes of $0, $583, $0 and $583	0	583	0	583
Amortization of net prior service credit included in net income, net of taxes of $(160), $(180), $(481) and $(484)	(160)	(180)	(481)	(484)
Distribution of WarnerMedia, net of taxes of $0, $0, $0 and $5	$ 0	$ 0	$ 0	$ 5

Amount of tax expense (benefit), before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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