Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions |
Mar. 31, 2019 |
Dec. 31, 2018 |
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Statement of Financial Position [Abstract] | ||
Allowance for doubtful accounts | $ 37 | $ 34 |
Accumulated depreciation | $ 613 | $ 596 |
X | ||||||||||
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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X | ||||||||||
- Definition A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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X | ||||||||||
- References No definition available.
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