Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of Changes in Accumulated Postretirement Benefits Obligations

Changes in Accumulated Postretirement Benefit Obligations:	2016			2015
Obligation at the Beginning of Year	$	783		$	746
Unrecognized Loss (Gain)	24			22
Components of Net Periodic Postretirement Benefit Cost
Service Cost	41			42
Interest Cost	29			26
Net Expected Benefit Payments	(63		)	(53		)
Obligation at End of Year	$	814		$	783

Components of Postretirement Benefit Expense

Components of Postretirement Benefit Expense:	2016		2015		2014
Service Cost	$	41	$	42	$	41
Interest Cost	29		26		28
Amortization of Unrecognized Net (Gain) Loss	6		5		—
Net Postretirement Benefit Expense	76		73		69
Net (Gain) Loss During Period Recognized in Other Comprehensive Income (Loss)	18		17		46
Total Recognized in Net Postretirement Benefit Expense and Other Comprehensive Income	$	94	$	90	$	115

Schedule of Assumptions Used to Determine Net Periodic Cost and Benefit Obligations

Assumptions Used to Determine Net Periodic Cost and Benefit Obligations:	2016		2015		2014
Discount Rate	3.72	%	3.82	%	3.62	%

Schedule of Assumption of Health Care Cost Trend Rates at Year-end

Assumed Health Care Cost Trend Rates at Year-end:	2016		2015
Health Care Cost Trend Rate Assumed for Next Year	8.00	%	8.00	%
Rate that the Cost Trend Rate Gradually Declines to	5.00	%	5.00	%
Year that the Rate Reaches the Rate it is Assumed to Remain at	2022		2021

Schedule of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates

A one-percentage-point change in assumed health care cost trend rates would have the following effects as of December 31, 2016:

	One-Percentage-Point Increase		One-Percentage-Point Decrease
Effect on Total of Service and Interest Cost	$	6	$	(5	)
Effect on Postretirement Benefit Obligation	$	48	$	(44	)

Schedule of Estimated Future Benefits

The following postretirement benefit payments, which reflect expected future service, are expected to be paid:

2017	$	59
2018	61
2019	69
2020	73
2021	68
2022-2026	417