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Profit Sharing Plans - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Profit Sharing Plans [Abstract] |  |  |
Minimum percentage amount of operating margin the company must attain for full calendar year for any profit sharing per individual to be paid (in hundredths) | 10.00% |  |
Amount of gross compensation eligible for profit sharing deferral per individual in calendar year when minimum operating margin is attained by company (in hundredths) | 2.00% |  |
Maximum amount of gross compensation eligible for profit sharing per individual in calendar year when 35% operating margin is attained by company (in hundredths) | 20.00% |  |
Percentage of operating margin the company must attain for full calendar year for maximum amount of profit sharing per individual to be paid (in hundredths) | 35.00% |  |
Profit sharing expense | $ 346 | $ 309 | $ 269

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- Definition Maximum amount of gross compensation eligible for profit sharing per individual in calendar year where 35% operating margin is attained by company. + References No definition available. + Details
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- Definition The minimum operating margin threshold the company must attain for the entire year for any profit sharing to be paid out to eligible employees, as of the balance sheet date. + References No definition available. + Details
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- Definition Percentage of operating margin the company must attain for full calendar year for maximum amount of profit sharing per individual to be paid. + References No definition available. + Details
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- Definition Amount of profit sharing paid as a percentage of eligible payroll per individual in calendar year when minimum operating margin of 10% is attained by company. + References No definition available. + Details
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- Definition Profit sharing plans [Abstract] + References No definition available. + Details
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- Definition Amount of labor-related expenses classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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