Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net earnings including noncontrolling interests	$ 533	$ 226	$ 1,938	$ 1,089
Other Comprehensive Income (Loss), before Tax
Foreign currency translation adjustment, before tax	(24)	(154)	305	(429)
Pension and other postretirement benefit liabilities adjustment, before tax	13	(5)	102	0
Unrealized gain (loss) on investments, before tax	6	(28)	4	(25)
Other Comprehensive Income (Loss), Tax
Foreign currency translation adjustment, tax effect	(30)	51	(78)	37
Pension and other postretirement benefit liabilities adjustment, tax effect	5	3	(22)	(9)
Unrealized gain (loss) on investments, tax effect	0	0	(1)	(1)
Other Comprehensive Income (Loss), Net of Tax
Foreign currency translation adjustment, net of tax	(54)	(103)	227	(392)
Pension and other postretirement benefit liabilities adjustment, net of tax	18	(2)	80	(9)
Other Comprehensive Income (Loss), Cash Flow Hedge And Net Investment Hedge, Gain (Loss), Before Reclassification, Before Tax	75	112	258	111
Other Comprehensive Income (Loss), Cash Flow Hedge And Net Investment Hedge, Gain (Loss), After Reclassification Adjustment, Tax	1	22	41	23
Other Comprehensive Income (Loss), Cash Flow Hedge And Net Investment Hedge, Gain (Loss), After Reclassification Adjustment, After Tax	74	90	217	88
Unrealized gain (loss) on investments, net of tax	6	(28)	3	(26)
Other comprehensive income (loss)	44	(43)	527	(339)
Comprehensive income (loss) including noncontrolling interests	577	183	2,465	750
Less: Comprehensive income (loss) attributable to noncontrolling interests	6	2	10	9
Comprehensive income (loss) attributable to controlling interests	$ 571	$ 181	$ 2,455	$ 741