Intangible Assets and Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Intangible assets
Weighted Amortizable Life (in years)	14 years		14 years
Finite-Lived Intangible Assets, Gross	$ 4,074		$ 4,096
Finite-Lived Intangible Assets, Accumulated Amortization	(2,828)		(2,788)
Net	1,246		$ 1,308
Amortization expense	77	$ 80
Remaining Nine Months of 2021	225
2022	284
2023	225
2024	167
2025	157
Thereafter	$ 188
Customer Relationships
Intangible assets
Weighted Amortizable Life (in years)	15 years		15 years
Finite-Lived Intangible Assets, Gross	$ 2,451		$ 2,493
Finite-Lived Intangible Assets, Accumulated Amortization	(1,614)		(1,600)
Net	$ 837		$ 893
Intellectual Property
Intangible assets
Weighted Amortizable Life (in years)	12 years		12 years
Finite-Lived Intangible Assets, Gross	$ 1,444		$ 1,439
Finite-Lived Intangible Assets, Accumulated Amortization	(1,097)		(1,073)
Net	$ 347		$ 366
Other
Intangible assets
Weighted Amortizable Life (in years)	14 years		14 years
Finite-Lived Intangible Assets, Gross	$ 179		$ 164
Finite-Lived Intangible Assets, Accumulated Amortization	(117)		(115)
Net	$ 62		$ 49