Restructuring, Impairment and Other Charges and Credits (Restructuring, Impairment, and Other Charges and Credits) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Severance charges	$ 6		$ 18	$ 141	$ 25
Asset impairment	22	$ 195		217		$ 369
Capacity realignment	96		107	245	168
Other charges and credits	47		23	130	29
Total restructuring, impairment and other charges and credits	171		148	733	222
Gross Margin [Member]
Restructuring Cost and Reserve [Line Items]
Severance charges	3		9	79	10
Capacity realignment	95		94	243	155
Other charges and credits	26		14	61	47
Total restructuring, impairment and other charges and credits	124		117	383	212
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance charges	3		6	34	12
Asset impairment	6			6
Other charges and credits	12		5	51	5
Total restructuring, impairment and other charges and credits	21		11	91	17
Research, Development And Engineering Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Severance charges			3	28	3
Asset impairment	16			211
Capacity realignment	1		13	2	13
Other charges and credits	1			2
Total restructuring, impairment and other charges and credits	18		16	243	16
Other [Member]
Restructuring Cost and Reserve [Line Items]
Other charges and credits	8		4	16	(23)
Total restructuring, impairment and other charges and credits	$ 8		$ 4	$ 16	$ (23)