Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2021		Sep. 30, 2020		Sep. 30, 2021		Sep. 30, 2020
Condensed Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 1,673		$ 1,363		$ 4,812		$ 3,969
Other comprehensive income/(loss):
Defined benefit plans	24		18		73		58
Foreign currency translation	(6)		3		(13)		(53)
Total other comprehensive income/(loss)	18	[1]	21	[1]	60	[2]	5	[2]
Comprehensive income	$ 1,691		$ 1,384		$ 4,872		$ 3,974

[1] Net of deferred taxes of ($8) million and ($6) million during the three months ended September 30, 2021 and 2020, respectively.

[2] Net of deferred taxes of ($26) million and ($18) million during the nine months ended September 30, 2021 and 2020, respectively.