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Supplementary Information
 12 Months Ended
Dec. 31, 2018
Other Liabilities Disclosure [Abstract]  
Supplementary Information
SUPPLEMENTARY INFORMATION
All Other Current Liabilities
All other current liabilities as of December 31, 2018 and 2017 include $955 million and $881 million, respectively, of employee related liabilities.
Product Warranties
We provide for estimated product warranty expenses when we sell the related products. Because warranty estimates are forecasts that are based on the best available information, primarily historical claims experience, claims costs may differ from amounts provided. An analysis of changes in the liability for product warranties are as follows:
 
2018
2017
Balance at beginning of year
$
164

$
74

Provisions
47

37

Expenditures
(96
)
(44
)
Other (1)
121

97

Balance at end of year
$
236

$
164

(1) 
Primarily related to the acquisition of Baker Hughes.
Allowance for doubtful accounts
The change in allowance for doubtful accounts is as follows:
 
2018
2017
Balance at beginning of year
$
330

$
186

Additions
47

159

Amounts written off
(43
)
(23
)
Other
(7
)
8

Balance at end of year
$
327

$
330