Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Intangible assets
Weighted Amortizable Life (in years)			14 years		14 years
Finite-Lived Intangible Assets, Gross	$ 4,156		$ 4,156		$ 4,151
Finite-Lived Intangible Assets, Accumulated Amortization	(2,793)		(2,793)		(2,586)
Net	1,363		1,363		$ 1,565
Amortization expense	78	$ 81	236	$ 244
Remaining Three Months of 2020	76		76
2021	296		296
2022	278		278
2023	220		220
2024	162		162
Thereafter	331		$ 331
Customer Relationships
Intangible assets
Weighted Amortizable Life (in years)			15 years		15 years
Finite-Lived Intangible Assets, Gross	2,453		$ 2,453		$ 2,450
Finite-Lived Intangible Assets, Accumulated Amortization	(1,533)		(1,533)		(1,406)
Net	920		$ 920		$ 1,044
Intellectual Property
Intangible assets
Weighted Amortizable Life (in years)			11 years		12 years
Finite-Lived Intangible Assets, Gross	1,522		$ 1,522		$ 1,510
Finite-Lived Intangible Assets, Accumulated Amortization	(1,131)		(1,131)		(1,055)
Net	391		$ 391		$ 455
Other
Intangible assets
Weighted Amortizable Life (in years)			13 years		13 years
Finite-Lived Intangible Assets, Gross	181		$ 181		$ 191
Finite-Lived Intangible Assets, Accumulated Amortization	(129)		(129)		(125)
Net	$ 52		$ 52		$ 66