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Summary of Significant Accounting Standards and Policies - Intangible assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Gross
Total other intangible assets, Gross	$ 673	$ 634
Accumulated Amortization	(229)	(197)
Net
Total other intangible assets, Net	$ 444	$ 437
Weighted Average Useful Life (years)	17 years	17 years
Patents
Gross
Finite-lived intangible assets, Gross	$ 33
Accumulated Amortization	(2)
Net
Finite-Lived Intangible Assets, Net, Total	$ 31
Weighted Average Useful Life (years)	12 years
Customer relationships
Gross
Finite-lived intangible assets, Gross	$ 356	$ 333
Accumulated Amortization	(115)	(93)
Net
Finite-Lived Intangible Assets, Net, Total	$ 241	$ 240
Weighted Average Useful Life (years)	20 years	20 years
Technology
Gross
Finite-lived intangible assets, Gross	$ 103	$ 103
Accumulated Amortization	(101)	(91)
Net
Finite-Lived Intangible Assets, Net, Total	$ 2	$ 12
Weighted Average Useful Life (years)	9 years	9 years
Other intangible asset
Gross
Finite-lived intangible assets, Gross	$ 38	$ 20
Accumulated Amortization	(11)	(13)
Net
Finite-Lived Intangible Assets, Net, Total	$ 27	$ 7
Weighted Average Useful Life (years)	19 years	15 years
Trademarks/tradenames
Gross
Indefinite-lived intangible assets	$ 143	$ 178
Net
Indefinite-lived intangible assets, Net	$ 143	$ 178

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-Publisher FASB
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-SubTopic 30
-Section 50
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