Benefit Plans - Pension Costs (Details) - Pension Plans - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 2	$ 9	$ 3	$ 18
Interest cost		13	15	26	31
Expected return on plan assets		(20)	(22)	(39)	(44)
Net loss from experience differences		4	5	8	10
Prior service cost/(credit)		0	1	0	1
Settlement losses and other expenses	[1]	8	4	12	8
Net periodic benefit costs		7	12	10	24
U.S. Plans | Simplify to Grow Program
Defined Benefit Plan Disclosure [Line Items]
Settlement losses and other expenses			5	4	5
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost		29	30	59	61
Interest cost		36	51	73	102
Expected return on plan assets		(96)	(101)	(195)	(204)
Net loss from experience differences		28	37	57	75
Prior service cost/(credit)		(1)	(1)	(3)	(3)
Settlement losses and other expenses	[1]	0	3	2	3
Net periodic benefit costs		$ (4)	$ 19	$ (7)	$ 34

[1] In connection with our Simplify to Grow Program, settlement losses and other expenses were $4 million for the three and six months ended June 30, 2020 and $5 million for the three and six months ended June 30, 2019. These losses were recorded within benefit plan non-service income on our condensed consolidated statements of earnings.