Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Jun. 30, 2020	Sep. 30, 2019
Intangible Assets [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	$ 62
Gross carrying amount, total intangible assets		$ 6,987	$ 6,985
Total Intangible Assets, Net		5,364	5,632
Definite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount		4,686	4,613
Accumulated Amortization		(1,623)	(1,353)
Total Definite-Lived Intangible Assets, Net		3,063	3,260
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net		2,301	2,372
Technology
Definite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount		1,318	1,307
Accumulated Amortization		(462)	(370)
Total Definite-Lived Intangible Assets, Net		856	937
Customer Relationships
Definite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount		2,732	2,722
Accumulated Amortization		(906)	(759)
Total Definite-Lived Intangible Assets, Net		1,826	1,963
Miscellaneous
Definite-Lived Intangible Assets, Gross [Abstract]
Gross Carrying Amount		636	584
Accumulated Amortization		(255)	(224)
Total Definite-Lived Intangible Assets, Net		381	360
Trademarks/trade names
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net		2,221	2,282
Miscellaneous
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying Amount, Gross and Net		$ 80	$ 90