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Revenue Recognition - Contract Cost Assets (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Contract Cost Assets
Total contract cost assets	$ 152	$ 157
Sales commissions
Contract Cost Assets
Total contract cost assets	141	146
Installation costs
Contract Cost Assets
Total contract cost assets	10	11
Other costs
Contract Cost Assets
Total contract cost assets	$ 1	$ 0

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- Definition

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

+ Details

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Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

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- Details

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- Details

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X

- Details

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