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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
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Acquisitions and Divestitures (Summary of Intangible Assets Acquired) (Details) - Sensus - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Nov. 01, 2016
Business Acquisition [Line Items]
Intangible assets		$ 787
FCC Licenses
Business Acquisition [Line Items]
Intangible assets		24
Customer and Distributor Relationships
Business Acquisition [Line Items]
Intangible assets		558
Tradenames
Business Acquisition [Line Items]
Intangible assets		98
Internally Developed Network Software
Business Acquisition [Line Items]
Life	7 years
Intangible assets		50
Technology
Business Acquisition [Line Items]
Intangible assets		38
Other
Business Acquisition [Line Items]
Intangible assets		$ 19
Minimum \| Customer and Distributor Relationships
Business Acquisition [Line Items]
Life	4 years
Minimum \| Tradenames
Business Acquisition [Line Items]
Life	10 years
Minimum \| Technology
Business Acquisition [Line Items]
Life	3 years
Minimum \| Other
Business Acquisition [Line Items]
Life	1 year
Maximum \| Customer and Distributor Relationships
Business Acquisition [Line Items]
Life	18 years
Maximum \| Tradenames
Business Acquisition [Line Items]
Life	25 years
Maximum \| Technology
Business Acquisition [Line Items]
Life	5 years
Maximum \| Other
Business Acquisition [Line Items]
Life	16 years